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CVE-2026-66399— phpMyFAQ before 4.1.6 Privilege Escalation via Group Membership

Quick assessment

Affected
thorsten phpMyFAQ
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

phpMyFAQ 4.1.6 之前的版本中存在一个权限提升漏洞，位于 GroupController::updateMembers() 方法中。该漏洞允许仅具有群组管理权限的管理员绕过所需权限的验证，加入高权限群组。攻击者可以将自身添加到已存在的、拥有用户管理权限的群组中，从而立即继承这些权限，进而修改或删除用户账户。

CVSS 6.5 · Medium EPSS 0.23% · P14

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 2

VendorProduct Version RangeStatus
thorsten phpMyFAQ < 4.1.6 affected
4.1.6 unaffected
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I. Basic Information for CVE-2026-66399

Vulnerability Information
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Vulnerability Title
phpMyFAQ before 4.1.6 Privilege Escalation via Group Membership
Source: CVE Program / CVE List V5
Vulnerability Description
phpMyFAQ before 4.1.6 contains a privilege escalation vulnerability in GroupController::updateMembers() that allows administrators with only group-management permissions to join privileged groups without verification of required rights. Attackers can add themselves to pre-existing groups holding user-management rights and immediately inherit those permissions to modify or delete user accounts.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
thorsten phpMyFAQ 0 ~ 4.1.6 -

II. Public POCs for CVE-2026-66399

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III. Intelligence Information for CVE-2026-66399

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Vendor Advisories for CVE-2026-66399 (2)

Same Patch Batch · thorsten · 2026-07-27 · 3 CVEs total

CVE-2026-66398 9.4 CRITICAL phpMyFAQ before 4.1.6 Remote Code Execution via Configuration API
CVE-2026-66397 8.6 HIGH phpMyFAQ before 4.1.6 Path Traversal via category image deletion

IV. Related Vulnerabilities

Same product: phpMyFAQ
Same vendor: thorsten
Same weakness: CWE-269

V. Comments for CVE-2026-66399

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