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HTML API: Reconsume script data terminating less-than tokens#12184

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sirreal wants to merge 6 commits into
WordPress:trunkfrom
sirreal:fix/script-less-than-normalize
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HTML API: Reconsume script data terminating less-than tokens#12184
sirreal wants to merge 6 commits into
WordPress:trunkfrom
sirreal:fix/script-less-than-normalize

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@sirreal

@sirreal sirreal commented Jun 15, 2026

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Summary

When a <script> tag terminated with < or <\, the parser would skip the next token. This would make HTML like <script><</script> appear as an incomplete token (a SCRIPT tag with no closer) to the Tag Processor.

Inputs like <script><</script> or <script>whatever… <</script> would fail to parse at an incomplete token.

Trac ticket: https://core.trac.wordpress.org/ticket/65372

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

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The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

Core Committers: Use this line as a base for the props when committing in SVN:

Props jonsurrell, dmsnell.

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Hi there! 👋

Thank you for your contribution to WordPress! 💖

It looks like this is your first pull request to wordpress-develop. Here are a few things to be aware of that may help you out!

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@sirreal sirreal requested a review from dmsnell June 15, 2026 19:08
Comment thread src/wp-includes/html-api/class-wp-html-tag-processor.php Outdated
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Test using WordPress Playground

The changes in this pull request can previewed and tested using a WordPress Playground instance.

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Test this pull request with WordPress Playground.

@dmsnell dmsnell left a comment

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Great catch; was this brought up via fuzzing?

@sirreal

sirreal commented Jun 16, 2026

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Yes! HTML API fuzz tests caught this.

pento pushed a commit that referenced this pull request Jun 16, 2026
Address edge cases where SCRIPT tag closers were not detected and the processor remained paused on an incomplete token.

Developed in #12184.

Props jonsurrell, dmsnell.
See #65372.


git-svn-id: https://develop.svn.wordpress.org/trunk@62509 602fd350-edb4-49c9-b593-d223f7449a82
@sirreal

sirreal commented Jun 16, 2026

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Merged in r62509.

@sirreal sirreal closed this Jun 16, 2026
@sirreal sirreal deleted the fix/script-less-than-normalize branch June 16, 2026 17:14
markjaquith pushed a commit to markjaquith/WordPress that referenced this pull request Jun 16, 2026
Address edge cases where SCRIPT tag closers were not detected and the processor remained paused on an incomplete token.

Developed in WordPress/wordpress-develop#12184.

Props jonsurrell, dmsnell.
See #65372.

Built from https://develop.svn.wordpress.org/trunk@62509


git-svn-id: http://core.svn.wordpress.org/trunk@61790 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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2 participants