Vulnerability · Published Jun 13, 2026 · Assigned by Wordfence

CVE-2026-9134Photo Gallery by FooGallery : Responsive Image Gallery, Masonry Gallery & Carousel <= 3.1.31 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'custom_attribute_key' Shortcode Parameter

Medium 6.4

In plain English

A medium-severity cross-site scripting in Photo Gallery by FooGallery : Responsive Image Gallery, Masonry Gallery & Carousel from fooplugins. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).

Severity (CVSS 3.1)6.4Medium

Exploit odds (30 days)0.3%top 77.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 products (as reported)

Vendor	Product	Versions
fooplugins	Photo Gallery by FooGallery : Responsive Image Gallery, Masonry Gallery & Carousel	0 – through 3.1.31

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

In plain English

Official description

Affected products (as reported)

References