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

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Summary

CVECVE-2026-9134
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-13 07:16:15 UTC
Updated2026-06-13 07:16:15 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 6.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Fooplugins Photo Gallery By FooGallery Responsive Image Gallery Masonry Gallery Carousel affected 3.1.31 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/foogallery/trunk/includes/functions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3542524/foogallery/tags/3.1.32/includes/functions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/foogallery/trunk/includes/functions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/foogallery/trunk/includes/class-gallery-advanced-sett... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/dd9650e6-7c3c-4510-9749-a3503... [email protected] www.wordfence.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Dmitrii Ignatyev (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-20T18:46:29.000ZVendor Notified
CNA2026-06-12T18:03:23.000ZDisclosed
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