Account Enumeration Vulnerability in phpMyFAQ by phpMyFAQ Team
CVE-2026-111887

6.9MEDIUM

Key Information:

Vendor

Thorsten

Status
pHPMyFAQ
Vendor
CVE Published:
17 October 2026

What is CVE-2026-111887?

An account enumeration vulnerability exists in phpMyFAQ versions prior to 4.1.9 and 4.2.0-alpha before 4.2.0-beta. This weakness enables unauthenticated attackers to validate registered display names and associated emails through a distinct HTTP 409 response when submitting guest comments. By exploiting this vulnerability, attackers can gain insight into valid user accounts, potentially linking usernames with their corresponding email addresses, thereby facilitating targeted phishing attacks.

Affected Version(s)

phpMyFAQ 0 < 4.1.9

phpMyFAQ 4.2.0-alpha < 4.2.0-beta

phpMyFAQ 4.1.9

References

https://github.com/thorsten/phpMyFAQ/security/advisories/...
vendor-advisory
https://www.vulncheck.com/advisories/phpmyfaq-before-4.1....
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

manus-use
.