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CVE-2026-9134

MEDIUM 6.4 CVSS 3.1
Published
June 13, 2026
Last modified
July 23, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Description

The FooGallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'custom_attribute_key' shortcode parameter in versions up to, and including, 3.1.31 This is due to an incomplete JavaScript event handler blacklist in the foogallery_sanitize_javascript() function, which blocks only a subset of HTML event attributes (onmouseover, onmouseout, onpointerenter, onclick, onload, onchange, onerror) while permitting others such as 'onmouseenter', combined with the failure to escape the attribute key when building the gallery container HTML in foogallery_build_container_attributes_safe(). This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • fooplugins Photo Gallery by FooGallery : Responsive Image Gallery, Masonry Gallery & Carousel — Up to and including 3.1.31

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/foogallery/trunk/includes/class-gallery-advanced-settings.php#L148
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/foogallery/trunk/includes/functions.php#L1516
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/foogallery/trunk/includes/functions.php#L480
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3542524/foogallery/tags/3.1.32/includes/functions.php?old=3535930&old_path=foogallery%2Ftags%2F3.1.31%2Fincludes%2Ffunctions.php
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/dd9650e6-7c3c-4510-9749-a3503924855f?source=cve
  • nvd.nist.gov Official NVD record