Cross-site scripting in phpMyFAQ - CVE-2026-85593
Published: August 21, 2026 / Updated: September 14, 2026
Vulnerability identifier: #VU144537
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-85593
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary script in a victim's browser.
The vulnerability exists due to cross-site scripting in FaqHelper::convertOldInternalLinks() when processing sanitized FAQ answer content containing a legacy-format internal URL. A remote user can create or edit an FAQ entry with crafted content to execute arbitrary script in a victim's browser.
User interaction is required to view the affected frontend FAQ page.
Affected software
phpMyFAQ
How to mitigate CVE-2026-85593
Install security update from vendor's website.
phpMyFAQ - update to 4.1.8