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Merge pull request #10585 from creative-commoners/pulls/4.11/cve-2022-37430

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Sanitise mixed case javascript
This commit is contained in:
Guy Sartorelli 2022-11-21 13:03:30 +13:00 committed by GitHub
commit 17f1c7ceed
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2 changed files with 7 additions and 1 deletions
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2
src/Forms/HTMLEditor/HTMLEditorSanitiser.php
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@ -347,7 +347,7 @@ class HTMLEditorSanitiser
}
// Matches "javascript:" with any arbitrary linebreaks inbetween the characters.
$regex = '/^\s*' . implode('\v*', str_split('javascript:')) . '/';
$regex = '/^\s*' . implode('\v*', str_split('javascript:')) . '/i';
// Strip out javascript execution in href or src attributes.
foreach (['src', 'href'] as $dangerAttribute) {
if ($el->hasAttribute($dangerAttribute)) {

6
tests/php/Forms/HTMLEditor/HTMLEditorSanitiserTest.php
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@ -98,6 +98,12 @@ class HTMLEditorSanitiserTest extends FunctionalTest
'<iframe></iframe>',
'Javascript in the src attribute of an iframe is completely removed'
],
[
'iframe[src]',
'<iframe src="jAvAsCrIpT:alert(0);"></iframe>',
'<iframe></iframe>',
'Mixed case javascript in the src attribute of an iframe is completely removed'
],
];
$config = HTMLEditorConfig::get('htmleditorsanitisertest');