CVE-2025-23199: Stored XSS-LibreNMS-Ports in librenms
First published: Thu Jan 16 2025(Updated: )
# StoredXSS-LibreNMS-Ports **Description:** Stored XSS on the parameter: `/ajax_form.php` -> param: descr Request: ```http POST /ajax_form.php HTTP/1.1 Host: <your_host> X-Requested-With: XMLHttpRequest X-CSRF-TOKEN: <your_XSRF_token> Content-Type: application/x-www-form-urlencoded; charset=UTF-8 Cookie: <your_cookie> type=update-ifalias&descr=%22%3E%3Cimg+src+onerror%3D%22alert(1)%22%3E&ifName=lo&port_id=1&device_id=1 ``` of Librenms version 24.10.1 ([https://github.com/librenms/librenms](https://github.com/librenms/librenms)) allows remote attackers to inject malicious scripts. When a user views or interacts with the page displaying the data, the malicious script executes immediately, leading to potential unauthorized actions or data exposure. **Proof of Concept:** 1. Add a new device through the LibreNMS interface. 2. Edit the newly created device and select the "ports" section. 3. In the "Description" field, enter the following payload: `"><img src onerror="alert(1)">`. 4. Save the changes. 5. The XSS vulnerability is triggered when accessing the "ports" tab, and the payload is executed again when hovering over the modified value in the "Port" field. Payload:  Executes:  The script execution vulnerability in the description field, as shown in the image, occurs at [Line 63 of functions.inc.php](https://github.com/librenms/librenms/blob/master/includes/html/functions.inc.php#L63) ```php $overlib_content = '<div class=overlib><span class=overlib-text>' . $text . '</span><br />'; ```  **Impact:** Execution of Malicious Code
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| composer/librenms/librenms | <24.10.1 | 24.11.0 |
| LibreNMS | <24.11.0 |
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Reference Links
- https://github.com/librenms/librenms/security/advisories/GHSA-27vf-3g4f-6jp7
- https://github.com/librenms/librenms/pull/16721
- https://github.com/librenms/librenms/commit/9d07d166b87634091dcf21c62b28f9b42a3118c4
- https://nvd.nist.gov/vuln/detail/CVE-2025-23199
- https://github.com/advisories/GHSA-27vf-3g4f-6jp7 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2025-23199?
CVE-2025-23199 has a medium severity rating due to the potential for stored cross-site scripting attacks.
How do I fix CVE-2025-23199?
To fix CVE-2025-23199, upgrade LibreNMS to version 24.11.0 or later.
What specific parameter is vulnerable in CVE-2025-23199?
The vulnerable parameter in CVE-2025-23199 is 'descr' in the '/ajax_form.php' endpoint.
What types of attacks can CVE-2025-23199 facilitate?
CVE-2025-23199 can facilitate stored cross-site scripting (XSS) attacks that could compromise user sessions.
Which versions of LibreNMS are affected by CVE-2025-23199?
LibreNMS versions up to and including 24.10.1 are affected by CVE-2025-23199.
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