function UrlTest::testLinkXSS

Confirms that invalid URLs are filtered in link generating functions.

File

core/modules/system/tests/src/Functional/Common/UrlTest.php, line 35

Class

UrlTest

Confirm that <a href="/api/drupal/core%21lib%21Drupal%21Core%21Url.php/class/Url/8.9.x" title="Defines an object that holds information about a URL." class="local">\Drupal\Core\Url</a>, <a href="/api/drupal/core%21lib%21Drupal%21Component%21Utility%21UrlHelper.php/function/UrlHelper%3A%3AfilterQueryParameters/8.9.x" title="Filters a URL query parameter array to remove unwanted elements." class="local">\Drupal\Component\Utility\UrlHelper::filterQueryParameters</a>(), <a href="/api/drupal/core%21lib%21Drupal%21Component%21Utility%21UrlHelper.php/function/UrlHelper%3A%3AbuildQuery/8.9.x" title="Parses an array into a valid, rawurlencoded query string." class="local">\Drupal\Component\Utility\UrlHelper::buildQuery</a>(), and <a href="/api/drupal/core%21lib%21Drupal%21Core%21Utility%21LinkGeneratorInterface.php/function/LinkGeneratorInterface%3A%3Agenerate/8.9.x" title="Renders a link to a URL." class="local">\Drupal\Core\Utility\LinkGeneratorInterface::generate</a>() work correctly with various input.

Namespace

Code

public function testLinkXSS() {
    // Test link generator.
    $text = $this->randomMachineName();
    $path = "<SCRIPT>alert('XSS')</SCRIPT>";
    $encoded_path = "3CSCRIPT%3Ealert%28%27XSS%27%29%3C/SCRIPT%3E";
    $link = Link::fromTextAndUrl($text, Url::fromUserInput('/' . $path))->toString();
    $this->assertStringContainsString($encoded_path, $link, new FormattableMarkup('XSS attack @path was filtered by \\Drupal\\Core\\Utility\\LinkGeneratorInterface::generate().', [
        '@path' => $path,
    ]));
    $this->assertStringNotContainsString($path, $link, new FormattableMarkup('XSS attack @path was filtered by \\Drupal\\Core\\Utility\\LinkGeneratorInterface::generate().', [
        '@path' => $path,
    ]));
    // Test \Drupal\Core\Url.
    $link = Url::fromUri('base:' . $path)->toString();
    $this->assertStringContainsString($encoded_path, $link, new FormattableMarkup('XSS attack @path was filtered by #theme', [
        '@path' => $path,
    ]));
    $this->assertStringNotContainsString($path, $link, new FormattableMarkup('XSS attack @path was filtered by #theme', [
        '@path' => $path,
    ]));
}