CVE-2026-111887

phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Account Enumeration via Guest Comment Endpoint

State: Published
Severity: 6.9 Medium
Published: Oct 17, 2026
Updated: Oct 18, 2026
Reserved: Oct 17, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N	VulnCheck
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	VulnCheck

Weaknesses

CWE-204 Observable Response Discrepancy

Affected Products

Product	Versions
phpMyFAQthorsten	before 4.1.9Affected 4.1.9Not affected
phpMyFAQthorsten	4.2.0-alpha to before 4.2.0-betaAffected 4.2.0-betaNot affected

References

GitHub Security Advisory (GHSA-pgxw-7c68-83w7)vendor-advisory
VulnCheck Advisory: phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Account Enumeration via Guest Comment Endpointthird-party-advisory

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