Stored Cross-Site Scripting in phpMyFAQ Affects Multiple Users
CVE-2026-56736

8.2HIGH

Key Information:

Vendor

Thorsten

Status
pHPMyFAQ
Vendor
CVE Published:
24 September 2026

What is CVE-2026-56736?

A stored cross-site scripting (XSS) vulnerability exists in phpMyFAQ, an open source FAQ web application. This issue affects versions prior to 4.2.0-alpha, allowing unauthenticated users or those with low privileges to inject arbitrary JavaScript code. When administrators view or edit user-submitted FAQ entries, this malicious code executes in their browsers, potentially leading to session theft and admin account takeovers. The vulnerability arises from the improper handling of HTML entities within the application, specifically how html_entity_decode() is used after strip_tags(), culminating in unvalidated content being rendered with Twig's |raw filter. The issue has been resolved in version 4.2.0-alpha.

Affected Version(s)

phpMyFAQ < 4.2.0-alpha

References

https://github.com/thorsten/phpMyFAQ/security/advisories/...
x_refsource_CONFIRM

CVSS V3.1

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.