fkie_cve-2026-84315

Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, Nginx UI does not apply RequireSecureSession to multiple authenticated mutation routes even though OTP-enabled users are expected to present a fresh X-Secure-Session-ID for sensitive actions. A stolen authenticated session can therefore create or alter automatic backups, DNS credentials and records, certificates and ACME users, Nginx control settings, and site or stream automation without completing the OTP or passkey step-up. This issue is fixed in version 2.4.1.

GHSA-5v7c-xpfp-p65m — Nginx UI OTP secure-session step-up is missing on sensitive mutation routes

Affected: Go: github.com/0xJacky/Nginx-UI

Reporter: Jagadesh Achanta

Target: `0xJacky/nginx-ui`

Affected version / commit tested: - App version: `2.3.10` - Commit: `4948fba8744e82c3d7003f68ee164e9f49421066` - Disclosure channel: GitHub Private Vulnerability Reporting - Credential reference: `cred:github-jagstack-gh-cli`

## AI assistance disclosure

This report was prepared by Jagadesh Achanta with assistance from OpenAI/Codex for public source review, local evidence collection, and report drafting.

## Summary

Nginx UI has a short-lived OTP/passkey "secure session" step-up boundary for users with 2FA enabled. `RequireSecureSession()` rejects an OTP-enabled user's request unless the request includes a valid `X-Secure-Session-ID` issued after a fresh OTP/passkey verification.

The project already applies this step-up middleware to sensitive operations such as:

- Nginx config create/edit/rename/delete; - site save/delete/enable/disable/rename/duplicate; - stream save/delete/enable/disable/rename/duplicate; - settings save and protected secret reads; - backup restore.

However, several similarly sensitive authenticated mutation routes remain outside `RequireSecureSession()`. An attacker who obtains an authenticated JWT/session for a 2FA-enabled user, but does not have the victim's fresh OTP/passkey secure-session token, can still perform those operations.

The affected route groups include:

- automatic backup create/modify/delete/restore/test-S3 operations; - DNS credential create/edit/delete operations; - certifi…

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fkie_cve-2026-84315

GHSA-5v7c-xpfp-p65m — Nginx UI OTP secure-session step-up is missing on sensitive mutation routes