CVE-2025-23199: librenms XSS — Exploit & Fix

Description

librenms is a community-based GPL-licensed network monitoring system. Affected versions are subject to a stored XSS on the parameter: `/ajax_form.php` -> param: descr. Librenms version up to 24.10.1 allow 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. This issue has been addressed in release version 24.11.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.

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CVSS v3.1 Score

4.6

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
librenms	librenms	< 24.11.0

References

Advisories & Patches

https://github.com/librenms/librenms/security/advisories/GHSA-27vf-3g4f-6jp7

Exploits

https://github.com/librenms/librenms/security/advisories/GHSA-27vf-3g4f-6jp7

Frequently Asked Questions

What is CVE-2025-23199? +

librenms is a community-based GPL-licensed network monitoring system. Affected versions are subject to a stored XSS on the parameter: `/ajax_form.php` -> param: descr. Librenms version up to 24.10.1 allow 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. This issue has been addressed in release version 24.11.0. Users are advised to upgrade. There are no known workarounds for this vulnerability. It has a CVSS v3.1 base score of 4.6 (MEDIUM).

How severe is CVE-2025-23199? +

CVE-2025-23199 has a CVSS v3.1 score of 4.6 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-23199? +

CVE-2025-23199 affects products from librenms, specifically: librenms. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-23199? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-23199