CVE-2026-85414 fooplugins CVE debrief

Who should care

WordPress administrators, security teams, and users with contributor-level access or above in installations using the Gallery : FooGallery plugin should assess exposure and prioritize remediation.

Why it matters

CVE-2026-85414 is a Stored Cross-Site Scripting vulnerability in the Gallery : FooGallery plugin for WordPress. It allows authenticated attackers to inject web scripts, which can lead to user session hijacking, unauthorized actions, or site defacement. WordPress administrators and security teams should assess exposure and prioritize remediation.

• Attackers can inject arbitrary web scripts, potentially leading to user session hijacking or unauthorized actions
• Compromised sites may distribute malware or phishing content
• Injected scripts can deface websites or steal user data
• Remediation requires verification of plugin version and application of patches or updates

Technical summary

The Gallery : FooGallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'custom_settings' Shortcode Attribute in all versions up to, and including, 3.3.2. This is due to insufficient input sanitization and output escaping, allowing authenticated attackers with contributor-level access and above to inject arbitrary web scripts. The vulnerability can lead to user session hijacking, unauthorized actions, or site defacement. WordPress administrators and security teams should assess exposure and prioritize remediation.

Defensive priority

Assess exposure and prioritize remediation for WordPress installations using the Gallery : FooGallery plugin, especially those allowing contributor-level access or above.

Recommended defensive actions

• Inventory and assess exposure of WordPress installations using the Gallery : FooGallery plugin
• Prioritize remediation for installations allowing contributor-level access or above
• Verify plugin version and apply patches or updates as available
• Monitor for suspicious activity or injected scripts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 6.4 and MEDIUM severity. Contributor-level access and above can inject arbitrary web scripts. The vulnerability is due to insufficient input sanitization and output escaping in the 'custom_settings' Shortcode Attribute. Defenders should verify plugin versions, assess exposure, and apply patches or updates as available. The CVE record was published on 2026-09-05T08:16:40.993Z and has not been modified since then.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.