Description
phpMyFAQ is an open source FAQ web application. Prior to version 4.0.18, the WebAuthn prepare endpoint (`/api/webauthn/prepare`) creates new active user accounts without any authentication, CSRF protection, captcha, or configuration checks. This allows unauthenticated attackers to create unlimited user accounts even when registration is disabled. Version 4.0.18 fixes the issue.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_confirm
https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-w22q-m2fm-x9f4
Scores
CVSS v3
7.5
EPSS
0.0006
EPSS Percentile
18.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-862
Status
published
Products (1)
phpmyfaq/phpmyfaq
< 4.0.18
Published
Feb 27, 2026
Tracked Since
Feb 28, 2026