CVE-2026-85593: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in thorsten phpMyFAQ
Description
phpMyFAQ versions before 4.1.8 contain a stored cross-site scripting vulnerability in FaqHelper::convertOldInternalLinks() that calls html_entity_decode() on sanitized FAQ content, reversing entity-encoding protection. Authenticated users with FAQ editing privileges can inject JavaScript payloads that execute in the browsers of all users viewing the affected FAQ pages.
CVSS v4.0
Score 5.1medium
Affected software
thorsten
phpMyFAQ
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-85593 is a stored cross-site scripting vulnerability in thorsten phpMyFAQ affecting versions prior to 4.1.8. The vulnerability arises because the FaqHelper::convertOldInternalLinks() function calls html_entity_decode() on content that was previously sanitized, effectively undoing the entity encoding protections. This allows authenticated users with FAQ editing rights to inject malicious JavaScript code that executes in the context of other users viewing the FAQ pages.
Potential Impact
An attacker with authenticated FAQ editing privileges can inject malicious JavaScript code into FAQ pages. This code executes in the browsers of users who view these pages, potentially leading to session hijacking, credential theft, or other client-side attacks. The vulnerability requires authentication with editing rights and user interaction to trigger the payload.
Mitigation Recommendations
A fix is available in phpMyFAQ version 4.1.8. Users should upgrade to version 4.1.8 or later to remediate this vulnerability. Until then, restrict FAQ editing privileges to trusted users to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-04T10:59:00.162Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a9aada1acd9273b4981da03
Added to database: 09/04/2026, 11:38:09 UTC
Last enriched: 09/14/2026, 23:28:04 UTC
Last updated: 10/18/2026, 18:48:24 UTC
Views: 73
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