Improper Authentication in nginx-ui - #VU142593
Published: August 14, 2026
Vulnerability identifier: #VU142593
CSH Severity: High
CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass two-factor authentication and gain full administrative access.
The vulnerability exists due to improper authentication in the password login endpoint and secure session enforcement when processing password-based login requests for passkey-only accounts. A remote attacker can authenticate with a compromised password without being required to complete a passkey assertion to bypass two-factor authentication and gain full administrative access.
Only accounts configured with a registered passkey and no TOTP secret are affected. The issue also impacts step-up checks for sensitive actions.
Affected software
nginx-ui
Remediation
Install security update from vendor's website.
nginx-ui - update to 2.5.0