Nginx UI: Authentication bypass: password login does not enforce a passkey-only second factor (2FA bypass)

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, POST /api/login checks EnabledOTP but does not require a WebAuthn assertion when EnabledPasskey is true and no TOTP secret is configured. A passkey-only account is therefore issued a session after password verification, despite Enabled2FA reporting that the account has a second factor. An attacker who obtains the password can take over the account and reach administrative functionality without the registered passkey. This issue is fixed in version 2.5.0.

[ Fixes ]Fixes and patches

• github.com/0xJacky/Nginx-UI 1.9.10-0.20260728074558-95cd21b70814Fixed version · GitHub Advisories · go package github.com/0xJacky/Nginx-UI: upgrade to 1.9.10-0.20260728074558-95cd21b70814 or later (affected >= 1.9.10-0.20250517140552-daee3ac7ade1, < 1.9.10-0.20260728074558-95cd21b70814)
• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Packages ]Affected open-source packages

• github.com/0xJacky/Nginx-UI goAffected >= 1.9.10-0.20250517140552-daee3ac7ade1, < 1.9.10-0.20260728074558-95cd21b70814 · fixed in 1.9.10-0.20260728074558-95cd21b70814 · GHSA-45gv-9wjv-xh7p

[ References ]References

• github.com/0xJacky/nginx-ui/commit/95cd21b70814e5d9a48a359aa238aeea1ac97429Patch
• github.com/0xJacky/nginx-ui/releases/tag/v2.5.0Release Notes
• github.com/0xJacky/nginx-ui/security/advisories/GHSA-45gv-9wjv-xh7pExploitVendor AdvisoryMitigation