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EUVD-2026-249203

2026-10-03T07:44:35.266662+00:00

EUVD-2026-249203

fkie_cve-2025-53534

2026-10-03T07:44:35.266765+00:00

RatPanel is a server operation and maintenance management panel. In versions 2.3.19 through 2.5.5, when an attacker obtains the backend login path of RatPanel (including but not limited to weak default paths, brute-force cracking, etc.), they can execute system commands or take over hosts managed by the panel without logging in. In addition to this remote code execution (RCE) vulnerability, the flawed code also leads to unauthorized access. RatPanel uses the CleanPath middleware provided by github.com/go-chi/chi package to clean URLs, but but the middleware does not process r.URL.Path, which can cause the paths to be misinterpreted. This is fixed in version 2.5.6.

GHSA-fm3m-jrgm-5ppg — RatPanel can perform remote command execution without authorization

2026-10-03T07:44:35.266907+00:00

Affected: Go: github.com/tnborg/panel

### Summary

* When an attacker obtains the backend login path of RatPanel (including but not limited to weak default paths, brute-force cracking, etc.), they can execute system commands or take over hosts managed by the panel **without logging in**. * In addition to this **remote code execution (RCE) vulnerability**, the flawed code also leads to **unauthorized access**.

### Details

In Go, `r.URL.Path` retrieves the part of the URL that comes after the port and before the query parameters or anchor symbols. For example, in the URL `http://localhost:8080/api/ws/ssh?id=1`, the retrieved path would be `/api/ws/ssh`.

However, if the request is made to `http://localhost:8080//api/ws/ssh?id=1`, the parsed `r.URL.Path` would be `//api/ws/ssh`.

RatPanel uses the `CleanPath` middleware provided by `github.com/go-chi/chi` package to clean URLs, The route path inside the chi router will be cleaned to `/api/ws/ssh`, but this middleware does not process `r.URL.Path`, so the path is still `//api/ws/ssh`.

![image](https://github.com/user-attachments/assets/788a7263-38f6-4b74-aa4a-b935239362f7)

In the `must_login` middleware, RatPanel uses `r.URL.Path` to match the hard-coded prefix whitelist, because `/api/ws` does not match `//api/ws`. The `must_login` middleware will allow the request, but `//api/ws` has been cleaned to `/api/ws` in the chi router. This inconsistency leads to authentication bypass and accessing the dangerous interfaces such as `/api/ws/exec` and `/api/ws/ssh`.

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openSUSE-SU-2025:15434-1 — govulncheck-vulndb-0.0.20250811T192933-1.1 on GA media

2026-10-03T07:44:35.267031+00:00

govulncheck-vulndb-0.0.20250811T192933-1.1 on GA media