CVE-2026-111887CWE-204

CVE-2026-111887

Medium · published October 17, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
16.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
6.9 · 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
EPSS
0.00261 · 16.9th percentile
Weakness
CWE-204 · Observable Response Discrepancy
Published
2026-10-17T23:16Z
References (3)
https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-pgxw-7c68-83w7 · [email protected]https://www.vulncheck.com/advisories/phpmyfaq-before-4.1.9-and-4.2.0-alpha-before-4.2.0-beta-account-enumeration-via-guest-comment-endpoint · [email protected]https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-pgxw-7c68-83w7 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 19 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 17 OCT 18:46Z
    phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Account Enumeration via Guest Comment Endpoint
    cvelistv5
  • 17 OCT 18:46Z
    phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Account Enumeration via Guest Comment Endpoint
    cvelistv5