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TI-2026-47158 Aliases CVE-2026-66399GHSA-5w7v-f8fx-865c

phpMyFAQ before 4.1.6 Privilege Escalation via Group Membership

Priority HIGH 72CWE-269Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-269.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00292 21st percentileScored 2026-11-07
Fix Fixed phpMyFAQ (thorsten): 4.1.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
thorstenphpMyFAQbefore 4.1.64.1.6Patch availableCNA
  • phpMyFAQ Vendorthorsten Affected before 4.1.6 Fixed in 4.1.6 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:phpmyfaq:phpmyfaq:*:*:*:*:*:*:*:*——thorsten
  • cpe:2.3:a:phpmyfaq:phpmyfaq:*:*:*:*:*:*:*:* Versions — — ·thorsten

Remediation

  • Fix · CNA phpMyFAQ (thorsten) Fixed in 4.1.6

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    thorsten phpMyFAQ 4.1.6

    3 records Highest priority Priority HIGH 3 HIGH

    Other records, highest priority first

    • TI-2026-47157 phpMyFAQ before 4.1.6 Remote Code Execution via Configuration APIPriority HIGH 76
    • TI-2026-47156 phpMyFAQ before 4.1.6 Path Traversal via category image deletionPriority HIGH 72
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-66399
  2. 2026-10-03 Alias added: GHSA-5w7v-f8fx-865c

References

Advisory 1

  • TI-2023-00296 Improper Authentication in thorsten/phpmyfaq CVSS 3.1CRITICAL 9.8
  • TI-2026-76118 Authentication bypass in phpMyFAQ via WebAuthn credential injection CVSS 4.0CRITICAL 9.3
  • TI-2026-32868 phpMyFAQ - Unauthenticated Two-Factor Authentication Brute-Force via /admin/check Endpoint CVSS 4.0CRITICAL 9.3
  • TI-2026-76108 Unauthenticated denial of service in phpMyFAQ API pagination CVSS 4.0HIGH 8.7
  • TI-2026-53313 phpMyFAQ 3.1.0 through 4.1.6 Authentication Bypass via LDAP CVSS 4.0HIGH 8.8
  • TI-2026-34083 phpMyFAQ - Unauthenticated Information Disclosure via getIdFromSolutionId Permission Bypass CVSS 4.0HIGH 8.7
See all 224 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences