Loading HuntDB...

GHSA-28p7-f6h6-3jh3

GitHub Security Advisory

LibreNMS has a Reflected XSS ('Cross-site Scripting') in librenms/includes/html/pages/wireless.inc.php

✓ GitHub Reviewed HIGH Has CVE

Advisory Details

### Summary
A Reflected Cross-Site Scripting (XSS) vulnerability in the "metric" parameter of the "/wireless" and "/health" endpoints allows attackers to inject arbitrary JavaScript. This vulnerability results in the execution of malicious code when a user accesses the page with a malicious "metric" parameter, potentially compromising their session and allowing unauthorized actions.

### Details
The "/wireless" and "/health" endpoints are vulnerable to reflected XSS in the "metric" parameter. An attacker can inject the following XSS payload into the "metric" parameter:
```<script>constructor['constructor'](atob('Y29uZmlybShkb2N1bWVudC5kb21haW4p'))();<!---->```

When the page is loaded with this malicious parameter, the script executes immediately. The vulnerability occurs due to improper sanitization of the "metric" parameter in the following sinks:
https://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/includes/html/pages/wireless.inc.php#L82
https://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/includes/html/pages/health.inc.php#L114

### PoC
1. Inject the following payload into the "metric" parameter of the "/wireless" or "/health" endpoint:
```<script>constructor['constructor'](atob('Y29uZmlybShkb2N1bWVudC5kb21haW4p'))();<!---->```
2. Access the page with the injected payload.
3. Observe that the injected script executes upon loading the page.

Example URL: ```http://<your_url>/wireless/metric=%3Cscript%3Econstructor['constructor'](atob('Y29uZmlybShkb2N1bWVudC5kb21haW4p'))();%3C!----%3E```

Example Request:
```http
GET /wireless/metric=%3Cscript%3Econstructor[%27constructor%27](atob(%27Y29uZmlybShkb2N1bWVudC5kb21haW4p%27))();%3C!----%3E HTTP/1.1
Host: <your_host>
Cookie: <your cookies>
```

### Impact

This vulnerability allows attackers to execute arbitrary JavaScript in the context of a user’s session by crafting a malicious URL. The attack could lead to session hijacking, unauthorized actions, or further exploitation by injecting malicious scripts.

Affected Packages

Packagist librenms/librenms
Affected versions: 0 (fixed in 24.10.0)

Related CVEs

Key Information

GHSA ID
GHSA-28p7-f6h6-3jh3
Published
November 15, 2024 3:45 PM
Last Modified
November 15, 2024 8:50 PM
CVSS Score
7.5 /10
Primary Ecosystem
Packagist
Primary Package
librenms/librenms
GitHub Reviewed
✓ Yes

Dataset

Last updated: November 25, 2025 6:29 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.