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

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.5 · CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L

EPSS

• CVE-2024-49764: 0.41% estimated exploitation activity in the next 30 days; percentile 35.80 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary A Stored Cross-Site Scripting (XSS) vulnerability in the "Capture Debug Information" page allows authenticated users to inject arbitrary JavaScript through the "hostname" parameter when creating a new device. This vulnerability results in the execution of malicious code when the "Capture Debug Information" page is visited, redirecting the user and sending non-httponly cookies to an attacker-controlled domain. Details When creating a new device, an attacker can inject the following XSS payload into the "hostname" parameter: (Note: You may need to URL-encode the '+' sign in the payload.) The payload triggers automatically when visiting the "Capture Debug Information" page for the device, redirecting the user's browser to the attacker-controlled domain along with any non-httponly cookies. The vulnerability is due to insufficient sanitization of the "url" variable before it is output in the HTML. This is evident in the following lines of code:…

Published by the source

15 Nov 2024, 15:27 UTC

Last modified by the source

10 Dec 2024, 23:36 UTC

Source last checked

26 Oct 2026, 14:29 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-rmr4-x6c9-jc68

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# Patch Next advisory brief: CVE-2024-49764

Advisory: LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/includes/html/pages/device/capture.inc.php
IDs: CVE-2024-49764, GHSA-rmr4-x6c9-jc68
Record: https://patchnext.com/advisories/cve-2024-49764 (revision 1, source checked 26 Oct 2026, 14:29 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: librenms/librenms 24.10.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist librenms/librenms: affected <= 24.9.1; fixed in 24.10.0

## Suggested inspection (read-only)
- Packagist librenms/librenms: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on librenms/librenms.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-rmr4-x6c9-jc68 (GitHub-reviewed advisory GHSA-rmr4-x6c9-jc68 lists affected ranges: Packagist librenms/librenms >=0 <=24.9.1)

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