function StandardTest::providerTestFilterXss

Provides test data for testFilterXss().

See also

\Drupal\Tests\editor\Unit\editor\EditorXssFilter\StandardTest::testFilterXss()

File

core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php, line 61

Class

StandardTest

@coversDefaultClass <a href="/api/drupal/core%21modules%21editor%21src%21EditorXssFilter%21Standard.php/class/Standard/10" title="Defines the standard text editor XSS filter." class="local">\Drupal\editor\EditorXssFilter\Standard</a> @group editor

Namespace

Code

public static function providerTestFilterXss() {
    $data = [];
    $data[] = [
        '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>',
        '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>',
    ];
    $data[] = [
        '<p style="color:red">Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>',
        '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>',
    ];
    $data[] = [
        '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown><script>alert("evil");</script>',
        '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>alert("evil");',
    ];
    $data[] = [
        '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown><a href="javascript:alert(1)">test</a>',
        '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown><a href="alert(1)">test</a>',
    ];
    // All cases listed on https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet
    // No Filter Evasion.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#No_Filter_Evasion
    $data[] = [
        '<SCRIPT SRC=http://ha.ckers.org/xss.js></SCRIPT>',
        '',
    ];
    // Image XSS using the JavaScript directive.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Image_XSS_using_the_JavaScript_directive
    $data[] = [
        '<IMG SRC="javascript:alert(\'XSS\');">',
        '<IMG src="alert(&#039;XSS&#039;);">',
    ];
    // No quotes and no semicolon.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#No_quotes_and_no_semicolon
    $data[] = [
        '<IMG SRC=javascript:alert(\'XSS\')>',
        '<IMG>',
    ];
    // Case insensitive XSS attack vector.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Case_insensitive_XSS_attack_vector
    $data[] = [
        '<IMG SRC=JaVaScRiPt:alert(\'XSS\')>',
        '<IMG>',
    ];
    // HTML entities.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#HTML_entities
    $data[] = [
        '<IMG SRC=javascript:alert("XSS")>',
        '<IMG>',
    ];
    // Grave accent obfuscation.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Grave_accent_obfuscation
    $data[] = [
        '<IMG SRC=`javascript:alert("RSnake says, \'XSS\'")`>',
        '<IMG>',
    ];
    // Malformed A tags.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Malformed_A_tags
    $data[] = [
        '<a onmouseover="alert(document.cookie)">xxs link</a>',
        '<a>xxs link</a>',
    ];
    $data[] = [
        '<a onmouseover=alert(document.cookie)>xxs link</a>',
        '<a>xxs link</a>',
    ];
    // Malformed IMG tags.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Malformed_IMG_tags
    $data[] = [
        '<IMG """><SCRIPT>alert("XSS")</SCRIPT>">',
        '<IMG>alert("XSS")"&gt;',
    ];
    // fromCharCode.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#fromCharCode
    $data[] = [
        '<IMG SRC=javascript:alert(String.fromCharCode(88,83,83))>',
        '<IMG src="alert(String.fromCharCode(88,83,83))">',
    ];
    // Default SRC tag to get past filters that check SRC domain.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Default_SRC_tag_to_get_past_filters_that_check_SRC_domain
    $data[] = [
        '<IMG SRC=# onmouseover="alert(\'xxs\')">',
        '<IMG src="#">',
    ];
    // Default SRC tag by leaving it empty.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Default_SRC_tag_by_leaving_it_empty
    $data[] = [
        '<IMG SRC= onmouseover="alert(\'xxs\')">',
        '<IMG>',
    ];
    // Default SRC tag by leaving it out entirely.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Default_SRC_tag_by_leaving_it_out_entirely
    $data[] = [
        '<IMG onmouseover="alert(\'xxs\')">',
        '<IMG>',
    ];
    // Decimal HTML character references.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Decimal_HTML_character_references
    $data[] = [
        '<IMG SRC=&#106;&#97;&#118;&#97;&#115;&#99;&#114;&#105;&#112;&#116;&#58;&#97;&#108;&#101;&#114;&#116;&#40;&#39;&#88;&#83;&#83;&#39;&#41;>',
        '<IMG src="alert(&#039;XSS&#039;)">',
    ];
    // Decimal HTML character references without trailing semicolons.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Decimal_HTML_character_references_without_trailing_semicolons
    $data[] = [
        '<IMG SRC=&#0000106&#0000097&#0000118&#0000097&#0000115&#0000099&#0000114&#0000105&#0000112&#0000116&#0000058&#0000097&#0000108&#0000101&#0000114&#0000116&#0000040&#0000039&#0000088&#0000083&#0000083&#0000039&#0000041>',
        '<IMG src="&amp;#0000106&amp;#0000097&amp;#0000118&amp;#0000097&amp;#0000115&amp;#0000099&amp;#0000114&amp;#0000105&amp;#0000112&amp;#0000116&amp;#0000058&amp;#0000097&amp;#0000108&amp;#0000101&amp;#0000114&amp;#0000116&amp;#0000040&amp;#0000039&amp;#0000088&amp;#0000083&amp;#0000083&amp;#0000039&amp;#0000041">',
    ];
    // Hexadecimal HTML character references without trailing semicolons.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Hexadecimal_HTML_character_references_without_trailing_semicolons
    $data[] = [
        '<IMG SRC=&#x6A&#x61&#x76&#x61&#x73&#x63&#x72&#x69&#x70&#x74&#x3A&#x61&#x6C&#x65&#x72&#x74&#x28&#x27&#x58&#x53&#x53&#x27&#x29>',
        '<IMG src="&amp;#x6A&amp;#x61&amp;#x76&amp;#x61&amp;#x73&amp;#x63&amp;#x72&amp;#x69&amp;#x70&amp;#x74&amp;#x3A&amp;#x61&amp;#x6C&amp;#x65&amp;#x72&amp;#x74&amp;#x28&amp;#x27&amp;#x58&amp;#x53&amp;#x53&amp;#x27&amp;#x29">',
    ];
    // Embedded tab.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Embedded_tab
    $data[] = [
        '<IMG SRC="jav  ascript:alert(\'XSS\');">',
        '<IMG src="alert(&#039;XSS&#039;);">',
    ];
    // Embedded Encoded tab.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Embedded_Encoded_tab
    $data[] = [
        '<IMG SRC="jav&#x09;ascript:alert(\'XSS\');">',
        '<IMG src="alert(&#039;XSS&#039;);">',
    ];
    // Embedded newline to break up XSS.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Embedded_newline_to_break_up_XSS
    $data[] = [
        '<IMG SRC="jav&#x0A;ascript:alert(\'XSS\');">',
        '<IMG src="alert(&#039;XSS&#039;);">',
    ];
    // Embedded carriage return to break up XSS.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Embedded_carriage_return_to_break_up_XSS
    $data[] = [
        '<IMG SRC="jav&#x0D;ascript:alert(\'XSS\');">',
        '<IMG src="alert(&#039;XSS&#039;);">',
    ];
    // Null breaks up JavaScript directive.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Null_breaks_up_JavaScript_directive
    $data[] = [
        "<IMG SRC=java\x00script:alert(\"XSS\")>",
        '<IMG>',
    ];
    // Non-alpha-non-digit XSS.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Non-alpha-non-digit_XSS
    $data[] = [
        '<SCRIPT/XSS SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
        '',
    ];
    $data[] = [
        '<BODY onload!#$%&()*~+-_.,:;?@[/|\\]^`=alert("XSS")>',
        '<BODY>',
    ];
    $data[] = [
        '<SCRIPT/SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
        '',
    ];
    // Extraneous open brackets.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Extraneous_open_brackets
    $data[] = [
        '<<SCRIPT>alert("XSS");//<</SCRIPT>',
        '&lt;alert("XSS");//&lt;',
    ];
    // No closing script tags.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#No_closing_script_tags
    $data[] = [
        '<SCRIPT SRC=http://ha.ckers.org/xss.js?< B >',
        '',
    ];
    // Protocol resolution in script tags.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Protocol_resolution_in_script_tags
    $data[] = [
        '<SCRIPT SRC=//ha.ckers.org/.j>',
        '',
    ];
    // Half open HTML/JavaScript XSS vector.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Half_open_HTML.2FJavaScript_XSS_vector
    $data[] = [
        '<IMG SRC="javascript:alert(\'XSS\')"',
        '<IMG src="alert(&#039;XSS&#039;)">',
    ];
    // Double open angle brackets.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Double_open_angle_brackets
    // @see http://ha.ckers.org/blog/20060611/hotbot-xss-vulnerability/ to
    // understand why this is a vulnerability.
    $data[] = [
        '<iframe src=http://ha.ckers.org/scriptlet.html <',
        '<iframe src="http://ha.ckers.org/scriptlet.html">',
    ];
    // Escaping JavaScript escapes.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Escaping_JavaScript_escapes
    // This one is irrelevant for Drupal; we *never* output any JavaScript code
    // that depends on the URL's query string.
    // End title tag.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#End_title_tag
    $data[] = [
        '</TITLE><SCRIPT>alert("XSS");</SCRIPT>',
        '</TITLE>alert("XSS");',
    ];
    // INPUT image.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#INPUT_image
    $data[] = [
        '<INPUT TYPE="IMAGE" SRC="javascript:alert(\'XSS\');">',
        '<INPUT type="IMAGE" src="alert(&#039;XSS&#039;);">',
    ];
    // BODY image.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#BODY_image
    $data[] = [
        '<BODY BACKGROUND="javascript:alert(\'XSS\')">',
        '<BODY background="alert(&#039;XSS&#039;)">',
    ];
    // IMG Dynsrc.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IMG_Dynsrc
    $data[] = [
        '<IMG DYNSRC="javascript:alert(\'XSS\')">',
        '<IMG dynsrc="alert(&#039;XSS&#039;)">',
    ];
    // IMG lowsrc.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IMG_lowsrc
    $data[] = [
        '<IMG LOWSRC="javascript:alert(\'XSS\')">',
        '<IMG lowsrc="alert(&#039;XSS&#039;)">',
    ];
    // List-style-image.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#List-style-image
    $data[] = [
        '<STYLE>li {list-style-image: url("javascript:alert(\'XSS\')");}</STYLE><UL><LI>XSS</br>',
        'li {list-style-image: url("javascript:alert(\'XSS\')");}<UL><LI>XSS</br>',
    ];
    // VBscript in an image.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#VBscript_in_an_image
    $data[] = [
        '<IMG SRC=\'vbscript:msgbox("XSS")\'>',
        '<IMG src=\'msgbox(&quot;XSS&quot;)\'>',
    ];
    // Livescript (older versions of Netscape only).
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Livescript_.28older_versions_of_Netscape_only.29
    $data[] = [
        '<IMG SRC="livescript:[code]">',
        '<IMG src="[code]">',
    ];
    // BODY tag.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#BODY_tag
    $data[] = [
        '<BODY ONLOAD=alert(\'XSS\')>',
        '<BODY>',
    ];
    // Event handlers.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Event_Handlers
    $events = [
        'onAbort',
        'onActivate',
        'onAfterPrint',
        'onAfterUpdate',
        'onBeforeActivate',
        'onBeforeCopy',
        'onBeforeCut',
        'onBeforeDeactivate',
        'onBeforeEditFocus',
        'onBeforePaste',
        'onBeforePrint',
        'onBeforeUnload',
        'onBeforeUpdate',
        'onBegin',
        'onBlur',
        'onBounce',
        'onCellChange',
        'onChange',
        'onClick',
        'onContextMenu',
        'onControlSelect',
        'onCopy',
        'onCut',
        'onDataAvailable',
        'onDataSetChanged',
        'onDataSetComplete',
        'onDblClick',
        'onDeactivate',
        'onDrag',
        'onDragEnd',
        'onDragLeave',
        'onDragEnter',
        'onDragOver',
        'onDragDrop',
        'onDragStart',
        'onDrop',
        'onEnd',
        'onError',
        'onErrorUpdate',
        'onFilterChange',
        'onFinish',
        'onFocus',
        'onFocusIn',
        'onFocusOut',
        'onHashChange',
        'onHelp',
        'onInput',
        'onKeyDown',
        'onKeyPress',
        'onKeyUp',
        'onLayoutComplete',
        'onLoad',
        'onLoseCapture',
        'onMediaComplete',
        'onMediaError',
        'onMessage',
        'onMousedown',
        'onMouseEnter',
        'onMouseLeave',
        'onMouseMove',
        'onMouseOut',
        'onMouseOver',
        'onMouseUp',
        'onMouseWheel',
        'onMove',
        'onMoveEnd',
        'onMoveStart',
        'onOffline',
        'onOnline',
        'onOutOfSync',
        'onPaste',
        'onPause',
        'onPopState',
        'onProgress',
        'onPropertyChange',
        'onReadyStateChange',
        'onRedo',
        'onRepeat',
        'onReset',
        'onResize',
        'onResizeEnd',
        'onResizeStart',
        'onResume',
        'onReverse',
        'onRowsEnter',
        'onRowExit',
        'onRowDelete',
        'onRowInserted',
        'onScroll',
        'onSeek',
        'onSelect',
        'onSelectionChange',
        'onSelectStart',
        'onStart',
        'onStop',
        'onStorage',
        'onSyncRestored',
        'onSubmit',
        'onTimeError',
        'onTrackChange',
        'onUndo',
        'onUnload',
        'onURLFlip',
    ];
    foreach ($events as $event) {
        $data[] = [
            '<p ' . $event . '="javascript:alert(\'XSS\');">Dangerous llama!</p>',
            '<p>Dangerous llama!</p>',
        ];
    }
    // BGSOUND.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#BGSOUND
    $data[] = [
        '<BGSOUND SRC="javascript:alert(\'XSS\');">',
        '<BGSOUND src="alert(&#039;XSS&#039;);">',
    ];
    // & JavaScript includes.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#.26_JavaScript_includes
    $data[] = [
        '<BR SIZE="&{alert(\'XSS\')}">',
        '<BR size="">',
    ];
    // STYLE sheet.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_sheet
    $data[] = [
        '<LINK REL="stylesheet" HREF="javascript:alert(\'XSS\');">',
        '',
    ];
    // Remote style sheet.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Remote_style_sheet
    $data[] = [
        '<LINK REL="stylesheet" HREF="http://ha.ckers.org/xss.css">',
        '',
    ];
    // Remote style sheet part 2.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Remote_style_sheet_part_2
    $data[] = [
        '<STYLE>@import\'http://ha.ckers.org/xss.css\';</STYLE>',
        '@import\'http://ha.ckers.org/xss.css\';',
    ];
    // Remote style sheet part 3.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Remote_style_sheet_part_3
    $data[] = [
        '<META HTTP-EQUIV="Link" Content="<http://ha.ckers.org/xss.css>; REL=stylesheet">',
        '<META http-equiv="Link">; REL=stylesheet"&gt;',
    ];
    // Remote style sheet part 4.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Remote_style_sheet_part_4
    $data[] = [
        '<STYLE>BODY{-moz-binding:url("http://ha.ckers.org/xssmoz.xml#xss")}</STYLE>',
        'BODY{-moz-binding:url("http://ha.ckers.org/xssmoz.xml#xss")}',
    ];
    // STYLE tags with broken up JavaScript for XSS.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_tags_with_broken_up_JavaScript_for_XSS
    $data[] = [
        '<STYLE>@im\\port\'\\ja\\vasc\\ript:alert("XSS")\';</STYLE>',
        '@im\\port\'\\ja\\vasc\\ript:alert("XSS")\';',
    ];
    // STYLE attribute using a comment to break up expression.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_attribute_using_a_comment_to_break_up_expression
    $data[] = [
        '<IMG STYLE="xss:expr/*XSS*/ession(alert(\'XSS\'))">',
        '<IMG>',
    ];
    // IMG STYLE with expression.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IMG_STYLE_with_expression
    $data[] = [
        'exp/*<A STYLE=\'no\\xss:noxss("*//*");
xss:ex/*XSS*//*/*/pression(alert("XSS"))\'>',
        'exp/*<A>',
    ];
    // STYLE tag (Older versions of Netscape only).
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_tag_.28Older_versions_of_Netscape_only.29
    $data[] = [
        '<STYLE TYPE="text/javascript">alert(\'XSS\');</STYLE>',
        'alert(\'XSS\');',
    ];
    // STYLE tag using background-image.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_tag_using_background-image
    $data[] = [
        '<STYLE>.XSS{background-image:url("javascript:alert(\'XSS\')");}</STYLE><A CLASS=XSS></A>',
        '.XSS{background-image:url("javascript:alert(\'XSS\')");}<A class="XSS"></A>',
    ];
    // STYLE tag using background.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_tag_using_background
    $data[] = [
        '<STYLE type="text/css">BODY{background:url("javascript:alert(\'XSS\')")}</STYLE>',
        'BODY{background:url("javascript:alert(\'XSS\')")}',
    ];
    // Anonymous HTML with STYLE attribute.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Anonymous_HTML_with_STYLE_attribute
    $data[] = [
        '<XSS STYLE="xss:expression(alert(\'XSS\'))">',
        '<XSS>',
    ];
    // Local htc file.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Local_htc_file
    $data[] = [
        '<XSS STYLE="behavior: url(xss.htc);">',
        '<XSS>',
    ];
    // US-ASCII encoding.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#US-ASCII_encoding
    // This one is irrelevant for Drupal; Drupal *always* outputs UTF-8.
    // META.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#META
    $data[] = [
        '<META HTTP-EQUIV="refresh" CONTENT="0;url=javascript:alert(\'XSS\');">',
        '<META http-equiv="refresh" content="alert(&#039;XSS&#039;);">',
    ];
    // META using data.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#META_using_data
    $data[] = [
        '<META HTTP-EQUIV="refresh" CONTENT="0;url=data:text/html base64,PHNjcmlwdD5hbGVydCgnWFNTJyk8L3NjcmlwdD4K">',
        '<META http-equiv="refresh" content="text/html base64,PHNjcmlwdD5hbGVydCgnWFNTJyk8L3NjcmlwdD4K">',
    ];
    // META with additional URL parameter
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#META
    $data[] = [
        '<META HTTP-EQUIV="refresh" CONTENT="0; URL=http://;URL=javascript:alert(\'XSS\');">',
        '<META http-equiv="refresh" content="//;URL=javascript:alert(&#039;XSS&#039;);">',
    ];
    // IFRAME.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IFRAME
    $data[] = [
        '<IFRAME SRC="javascript:alert(\'XSS\');"></IFRAME>',
        '<IFRAME src="alert(&#039;XSS&#039;);"></IFRAME>',
    ];
    // IFRAME Event based.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IFRAME_Event_based
    $data[] = [
        '<IFRAME SRC=# onmouseover="alert(document.cookie)"></IFRAME>',
        '<IFRAME src="#"></IFRAME>',
    ];
    // FRAME.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#FRAME
    $data[] = [
        '<FRAMESET><FRAME SRC="javascript:alert(\'XSS\');"></FRAMESET>',
        '<FRAMESET><FRAME src="alert(&#039;XSS&#039;);"></FRAMESET>',
    ];
    // TABLE.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#TABLE
    $data[] = [
        '<TABLE BACKGROUND="javascript:alert(\'XSS\')">',
        '<TABLE background="alert(&#039;XSS&#039;)">',
    ];
    // TD.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#TD
    $data[] = [
        '<TABLE><TD BACKGROUND="javascript:alert(\'XSS\')">',
        '<TABLE><TD background="alert(&#039;XSS&#039;)">',
    ];
    // DIV background-image.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#DIV_background-image
    $data[] = [
        '<DIV STYLE="background-image: url(javascript:alert(\'XSS\'))">',
        '<DIV>',
    ];
    // DIV background-image with unicoded XSS exploit.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#DIV_background-image_with_unicoded_XSS_exploit
    $data[] = [
        '<DIV STYLE="background-image:\\0075\\0072\\006C\\0028\'\\006a\\0061\\0076\\0061\\0073\\0063\\0072\\0069\\0070\\0074\\003a\\0061\\006c\\0065\\0072\\0074\\0028.1027\\0058.1053\\0053\\0027\\0029\'\\0029">',
        '<DIV>',
    ];
    // DIV background-image plus extra characters.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#DIV_background-image_plus_extra_characters
    $data[] = [
        '<DIV STYLE="background-image: url(&#1;javascript:alert(\'XSS\'))">',
        '<DIV>',
    ];
    // DIV expression.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#DIV_expression
    $data[] = [
        '<DIV STYLE="width: expression(alert(\'XSS\'));">',
        '<DIV>',
    ];
    // Downlevel-Hidden block.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Downlevel-Hidden_block
    $data[] = [
        '<!--[if gte IE 4]>
 <SCRIPT>alert(\'XSS\');</SCRIPT>
 <![endif]-->',
        "\n alert('XSS');\n ",
    ];
    // BASE tag.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#BASE_tag
    $data[] = [
        '<BASE HREF="javascript:alert(\'XSS\');//">',
        '<BASE href="alert(&#039;XSS&#039;);//">',
    ];
    // OBJECT tag.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#OBJECT_tag
    $data[] = [
        '<OBJECT TYPE="text/x-scriptlet" DATA="http://ha.ckers.org/scriptlet.html"></OBJECT>',
        '',
    ];
    // Using an EMBED tag you can embed a Flash movie that contains XSS.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Using_an_EMBED_tag_you_can_embed_a_Flash_movie_that_contains_XSS
    $data[] = [
        '<EMBED SRC="http://ha.ckers.org/xss.swf" AllowScriptAccess="always"></EMBED>',
        '',
    ];
    // You can EMBED SVG which can contain your XSS vector.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#You_can_EMBED_SVG_which_can_contain_your_XSS_vector
    // cspell:disable-next-line
    $data[] = [
        '<EMBED SRC="data:image/svg+xml;base64,PHN2ZyB4bWxuczpzdmc9Imh0dH A6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcv MjAwMC9zdmciIHhtbG5zOnhsaW5rPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hs aW5rIiB2ZXJzaW9uPSIxLjAiIHg9IjAiIHk9IjAiIHdpZHRoPSIxOTQiIGhlaWdodD0iMjAw IiBpZD0ieHNzIj48c2NyaXB0IHR5cGU9InRleHQvZWNtYXNjcmlwdCI+YWxlcnQoIlh TUyIpOzwvc2NyaXB0Pjwvc3ZnPg==" type="image/svg+xml" AllowScriptAccess="always"></EMBED>',
        '',
    ];
    // XML data island with CDATA obfuscation.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#XML_data_island_with_CDATA_obfuscation
    $data[] = [
        '<XML ID="xss"><I><B><IMG SRC="javas<!-- -->cript:alert(\'XSS\')"></B></I></XML><SPAN DATASRC="#xss" DATAFLD="B" DATAFORMATAS="HTML"></SPAN>',
        '<XML id="xss"><I><B><IMG>cript:alert(\'XSS\')"&gt;</B></I></XML><SPAN datasrc="#xss" datafld="B" dataformatas="HTML"></SPAN>',
    ];
    // Locally hosted XML with embedded JavaScript that is generated using an XML data island.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Locally_hosted_XML_with_embedded_JavaScript_that_is_generated_using_an_XML_data_island
    // This one is irrelevant for Drupal; Drupal disallows XML uploads by
    // default.
    // HTML+TIME in XML.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#HTML.2BTIME_in_XML
    $data[] = [
        '<?xml:namespace prefix="t" ns="urn:schemas-microsoft-com:time"><?import namespace="t" implementation="#default#time2"><t:set attributeName="innerHTML" to="XSS<SCRIPT DEFER>alert("XSS")</SCRIPT>">',
        '&lt;?xml:namespace prefix="t" ns="urn:schemas-microsoft-com:time"&gt;&lt;?import namespace="t" implementation="#default#time2"&gt;<t set attributename="innerHTML">alert("XSS")"&gt;',
    ];
    // Assuming you can only fit in a few characters and it filters against ".js".
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Assuming_you_can_only_fit_in_a_few_characters_and_it_filters_against_.22.js.22
    $data[] = [
        '<SCRIPT SRC="http://ha.ckers.org/xss.jpg"></SCRIPT>',
        '',
    ];
    // IMG Embedded commands.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IMG_Embedded_commands
    // This one is irrelevant for Drupal; this is actually a CSRF, for which
    // Drupal has CSRF protection. See https://www.drupal.org/node/178896.
    // Cookie manipulation.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Cookie_manipulation
    $data[] = [
        '<META HTTP-EQUIV="Set-Cookie" Content="UserID=<SCRIPT>alert(\'XSS\')</SCRIPT>">',
        '<META http-equiv="Set-Cookie">alert(\'XSS\')"&gt;',
    ];
    // UTF-7 encoding.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#UTF-7_encoding
    // This one is irrelevant for Drupal; Drupal *always* outputs UTF-8.
    // XSS using HTML quote encapsulation.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#XSS_using_HTML_quote_encapsulation
    $data[] = [
        '<SCRIPT a=">" SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
        '" SRC="http://ha.ckers.org/xss.js"&gt;',
    ];
    $data[] = [
        '<SCRIPT =">" SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
        '" SRC="http://ha.ckers.org/xss.js"&gt;',
    ];
    $data[] = [
        '<SCRIPT a=">" \'\' SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
        '" \'\' SRC="http://ha.ckers.org/xss.js"&gt;',
    ];
    $data[] = [
        '<SCRIPT "a=\'>\'" SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
        '\'" SRC="http://ha.ckers.org/xss.js"&gt;',
    ];
    $data[] = [
        '<SCRIPT a=`>` SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
        '` SRC="http://ha.ckers.org/xss.js"&gt;',
    ];
    $data[] = [
        '<SCRIPT a=">\'>" SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
        '\'&gt;" SRC="http://ha.ckers.org/xss.js"&gt;',
    ];
    $data[] = [
        '<SCRIPT>document.write("<SCRI");</SCRIPT>PT SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
        'document.write("<SCRI>PT SRC="http://ha.ckers.org/xss.js"&gt;',
    ];
    // URL string evasion.
    // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#URL_string_evasion
    // This one is irrelevant for Drupal; Drupal doesn't forbid linking to some
    // sites, it only forbids linking to any protocols other than those that are
    // whitelisted.
    // Test XSS filtering on data-attributes.
    // @see \Drupal\editor\EditorXssFilter::filterXssDataAttributes()
    // The following two test cases verify that XSS attack vectors are filtered.
    $data[] = [
        '<img src="butterfly.jpg" data-caption="&lt;script&gt;alert();&lt;/script&gt;" />',
        '<img src="butterfly.jpg" data-caption="alert();">',
    ];
    $data[] = [
        '<img src="butterfly.jpg" data-caption="&lt;EMBED SRC=&quot;http://ha.ckers.org/xss.swf&quot; AllowScriptAccess=&quot;always&quot;&gt;&lt;/EMBED&gt;" />',
        '<img src="butterfly.jpg" data-caption>',
    ];
    // When including HTML-tags as visible content, they are double-escaped.
    // This test case ensures that we leave that content unchanged.
    $data[] = [
        '<img src="butterfly.jpg" data-caption="&amp;lt;script&amp;gt;alert();&amp;lt;/script&amp;gt;" />',
        '<img src="butterfly.jpg" data-caption="&amp;lt;script&amp;gt;alert();&amp;lt;/script&amp;gt;">',
    ];
    return $data;
}