Nginx UI: MCP configuration tools bypass restricted directive validation and allow secondary authenticated users to execute NJS in Nginx worker context

[ Description ]Official description

Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, the regular HTTP configuration API rejects restricted Nginx directives such as load_module, js_import, and js_content. However, the MCP configuration interface allows a secondary authenticated user to write and apply equivalent restricted configuration content. This allows the user to load ngx_http_js_module.so, import attacker-controlled JavaScript, reload Nginx, and execute NJS in the Nginx worker context. This issue is fixed in version 2.4.1.

[ Fixes ]Fixes and patches

• github.com/0xJacky/Nginx-UI 1.9.10-0.20260703131214-23d1934099b0Fixed version · GitHub Advisories · go package github.com/0xJacky/Nginx-UI: upgrade to 1.9.10-0.20260703131214-23d1934099b0 or later (affected < 1.9.10-0.20260703131214-23d1934099b0)

[ Packages ]Affected open-source packages

• github.com/0xJacky/Nginx-UI goAffected < 1.9.10-0.20260703131214-23d1934099b0 · fixed in 1.9.10-0.20260703131214-23d1934099b0 · GHSA-5r62-gj48-897x

[ References ]References

• github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2
• github.com/0xJacky/nginx-ui/releases/tag/v2.4.1
• github.com/0xJacky/nginx-ui/security/advisories/GHSA-5r62-gj48-897x