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TI-2026-76095 Aliases CVE-2026-111887GHSA-cv2x-hcfv-23pm

Account enumeration in phpMyFAQ via guest comment endpoint

Priority HIGH 70CWE-204Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-204.

Summary

phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta has an account enumeration flaw in its guest comment create endpoint, classified as CWE-204 (Observable Response Discrepancy). An unauthenticated remote attacker can submit guest comments with candidate user and mail values and use a distinct HTTP 409 response to confirm registered display names and emails. The attacker can then link names to emails for targeted phishing.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta contains an account enumeration vulnerability that allows unauthenticated attackers to confirm registered display names and emails via a distinct HTTP 409 response. Attackers can submit guest comments to the comment create endpoint with candidate user and mail values to link names to emails for targeted phishing.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00337 27th percentileScored 2026-11-07
Fix Fixed phpMyFAQ (thorsten): 4.1.9, 4.2.0-beta

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

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 4.1.94.1.9Patch availableCNA
thorstenphpMyFAQ4.2.0-alpha to before 4.2.0-beta4.2.0-betaPatch availableCNA
  • phpMyFAQ Vendorthorsten Affected before 4.1.9 Fixed in 4.1.9 Patch available CNA
  • phpMyFAQ Vendorthorsten Affected 4.2.0-alpha to before 4.2.0-beta Fixed in 4.2.0-beta 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

Upgrade phpMyFAQ to 4.1.9, or to 4.2.0-beta if running 4.2.0-alpha. These are the fixed versions.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA phpMyFAQ (thorsten) Fixed in 4.1.9
  • Fix · CNA phpMyFAQ (thorsten) Fixed in 4.2.0-beta

Fixed in the same release

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

  • Release ·

    thorsten phpMyFAQ 4.2.0-beta

    24 records Highest priority Priority HIGH 10 HIGH, 10 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2026-76108 Unauthenticated denial of service in phpMyFAQ API paginationPriority HIGH 77
    • TI-2026-76115 Authorization bypass in phpMyFAQ REST API edits restricted FAQsPriority HIGH 73
    • TI-2026-76092 phpMyFAQ e-mail change lacks password check, enabling takeoverPriority HIGH 73
    Show all 24 records →
  • Release ·

    thorsten phpMyFAQ 4.1.9

    14 records Highest priority Priority HIGH 5 HIGH, 6 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2026-76118 Authentication bypass in phpMyFAQ via WebAuthn credential injectionPriority HIGH 81
    • TI-2026-76115 Authorization bypass in phpMyFAQ REST API edits restricted FAQsPriority HIGH 73
    • TI-2026-76092 phpMyFAQ e-mail change lacks password check, enabling takeoverPriority HIGH 73
    Show all 14 records →

Timeline

  1. 2026-10-18 Threatist record created from CVE-2026-111887
  2. 2026-10-18 Alias added: GHSA-cv2x-hcfv-23pm

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