---
id: CVE-2026-85591
title: >-
  phpMyFAQ versions before 4.1.8 contain an authentication bypass vulnerability
  in the user control panel API endpoint that allows authenticated attackers to
  change account passwords without verifying the current password
summary: >-
  phpMyFAQ versions before 4.1.8 contain an authentication bypass vulnerability
  in the user control panel API endpoint that allows authenticated attackers to
  change account passwords without verifying the current password. Attackers
  with s…
severity: high
cvss: 7.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-620
vendor: thorsten
product: phpMyFAQ
affected:
  - phpMyFAQ < 4.1.8
published: '2026-09-04'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T16:17:59.390'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85591'
references:
  - url: >-
      https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-6r2c-694w-24qv
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/phpmyfaq-before-4.1.8-authentication-bypass-via-unverified-password-change
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-10T14:19:26.003151Z'
cvssSource: cna
epss: 0.00296
epssPercentile: 0.2245
ingestedAt: '2026-09-08T20:10:03.165Z'
---

## Overview

phpMyFAQ versions before 4.1.8 contain an authentication bypass vulnerability in the user control panel API endpoint that allows authenticated attackers to change account passwords without verifying the current password. Attackers with session access can submit a PUT request to the user data update endpoint with only a CSRF token to silently change any user's password, including administrators, causing irreversible account takeover and victim lockout.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.