Photo Directory: check the value that gets stored, not the one submitted - #877
Photo Directory: check the value that gets stored, not the one submitted#877obenland wants to merge 2 commits into
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The check read `$_POST` while the field is stored sanitized, and sanitizing can close a gap that kept the submitted value from matching. `[cap<x>tion width="1"]` is not a shortcode until `sanitize_text_field()` removes the `<x>`, so it was accepted and landed as a live `[caption]`. Run the check through the same field-to-sanitizer map `sanitize_submitted_description()` stores them with, so nothing edits the value after the decision is made. Also compare `preg_match()` against 1 rather than truthiness. It returns false on a PCRE error, which a long enough subject can provoke, and that read as "no shortcode found". Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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ChangesUpload validation
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to Upload descriptions are validated after sanitization, preventing sanitized shortcode syntax from being stored while rejecting inputs that cannot be safely checked. No current merge-blocking risk remains. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Inline comments:
In
`@wordpress.org/public_html/wp-content/plugins/photo-directory/inc/uploads.php`:
- Line 722: Update the shortcode validation around preg_match to store its
return value, reject the field when the result is false, and only accept a match
when the stored result equals 1. Preserve the existing regex and sanitized
submitted value behavior.
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wordpress.org/public_html/wp-content/plugins/photo-directory/inc/uploads.php
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`preg_match()` returns false, not 0, when PCRE gives up, and `1 === false` is false, so comparing against 1 accepted the field just as truthiness did. A submitted `[caption /x/x/x…]` of about 20 KB trips the JIT stack limit and was waved through. Refuse anything that is not a clean no-match, so an undecidable value is treated as an unsafe one. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Follow-up to [c2b3b50], which refuses a submission whose title, description or caption carries shortcode syntax.
The check read
$_POST, but the field is stored sanitized, and sanitizing can close a gap that kept the submittedvalue from matching:
Alt [cap<x>tion width="1"]y[/caption] textcarries no shortcode as submitted —cap<x>tionis not a tag name, sonothing matches.
sanitize_text_field()then removes the<x>, and a live[caption]is what lands inpost_content. Same shape as the splice this check was added to catch, only the edit happens after the decisioninstead of during it.
Run the check through the same field-to-sanitizer map
sanitize_submitted_description()stores them with, so thedecision is made about the exact bytes that get written and nothing edits them afterwards.
Also compares
preg_match()against1rather than truthiness — it returnsfalse, not0, when PCRE gives up,which a long enough description can provoke, and that read as "no shortcode found".
Bracketed prose is still accepted;
[developers]is not a registered shortcode before or after sanitizing.The equivalent check in the Theme Directory does not need this:
WP_Theme::sanitize_header()runswp_kses()onDescriptionbeforeget()returns it, so that check already sees the post-kses value and it is the same stringthat gets stored.
Testing steps
Alt [cap<x>tion width="1"]y[/caption] text. The submission is refused; ontrunkit is accepted and stores a live[caption …].Alt [gal<b></b>lery ids="1"] text. Same.A photo of [developers] at work. Still accepted, stored unchanged.🤖 Generated with Claude Code
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