CVE-2026-109234

Description

The Meow Lightbox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'post_content (bbPress reply body)' parameter in all versions up to, and including, 5.6.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the administrator to have enabled Output Buffering, the HtmlDomParser engine, and Aggressive Resolve, as well as a stored-HTML submission surface (such as bbPress anonymous replies) whose kses allow-list preserves img attributes; given these preconditions, a one-shot unauthenticated submission can execute arbitrary JavaScript in the context of any user who views the affected page.

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/45fcd17e-10d5-4357-84cc-2527b07b584e?source=cve

https://plugins.trac.wordpress.org/changeset?old_path=/meow-lightbox/tags/5.6.4&new_path=/meow-lightbox/tags/5.6.5

https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/vendor/kub-at/php-simple-html-dom-parser/src/KubAT/PhpSimple/lib/simple_html_dom.php#L490

https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/vendor/kub-at/php-simple-html-dom-parser/src/KubAT/PhpSimple/lib/simple_html_dom.php#L2043

https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L901

https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L1276

https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L1142

https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L1115

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-114574

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

EPSS