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

Quick assessment

Affected
fooplugins Photo Gallery by FooGallery : Responsive Image Gallery, Masonry Gallery & Carousel
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

fooplugins Photo Gallery by FooGallery是fooplugins公司的一款图片编辑插件。 FooPlugins Photo Gallery by FooGallery 3.1.31及之前版本存在跨站脚本漏洞，该漏洞源于foogallery_sanitize_javascript () 函数的 JavaScript 事件处理程序黑名单不完整，且构建图库容器 HTML 时未转义 “custom_attribute_key” 参数属性键，导致具贡献者及以上权限的认证攻击者能注入

CVSS 6.4 · Medium EPSS 0.33% · P24

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript

Affected Version Matrix 1

VendorProduct Version RangeStatus
fooplugins Photo Gallery by FooGallery : Responsive Image Gallery, Masonry Gallery & Carousel ≤ 3.1.31 affected
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I. Basic Information for CVE-2026-9134

Vulnerability Information
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Vulnerability Title
Photo Gallery by FooGallery : Responsive Image Gallery, Masonry Gallery & Carousel <= 3.1.31 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'custom_attribute_key' Shortcode Parameter
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
FooPlugins Photo Gallery by FooGallery 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
fooplugins Photo Gallery by FooGallery是fooplugins公司的一款图片编辑插件。 FooPlugins Photo Gallery by FooGallery 3.1.31及之前版本存在跨站脚本漏洞，该漏洞源于foogallery_sanitize_javascript () 函数的 JavaScript 事件处理程序黑名单不完整，且构建图库容器 HTML 时未转义 “custom_attribute_key” 参数属性键，导致具贡献者及以上权限的认证攻击者能注入
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
fooplugins Photo Gallery by FooGallery : Responsive Image Gallery, Masonry Gallery & Carousel 0 ~ 3.1.31 -

II. Public POCs for CVE-2026-9134

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III. Intelligence Information for CVE-2026-9134

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Patches & Fixes for CVE-2026-9134 (2)

Vendor Advisories for CVE-2026-9134 (1)

IV. Related Vulnerabilities

Same vendor: fooplugins
Same weakness: CWE-79

V. Comments for CVE-2026-9134

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