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GHSA-hxw5-9cc5-cmw5low2.1

LibreNMS stored Cross-site Scripting vulnerability in poller group name

Impact

Before Setting: Enable 'distributed_poller' in http://localhost/settings/poller/distributed 1. Attacker creates a new poller group and injects the payload in the 'group name' parameter

Source excerpt · OSV

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

librenms/librenms Packagist
Affected rangeRecorded fix
Earlier releases before 25.5.0Ecosystem versions25.5.0

Version evidence: OSV · GHSA-hxw5-9cc5-cmw5

View original version evidence (138 explicit versions)

Original source description

LibreNMS v25.4.0 suffers from Stored Cross-Site Scripting (XSS) Vulnerability in the 'group name' parameter of the 'http://localhost/poller/groups' form. This vulnerability allows attackers to inject malicious scripts into web pages viewed by other users.

---------------------------------POC-----------------------------

Before Setting: Enable 'distributed_poller' in http://localhost/settings/poller/distributed

  1. Attacker creates a new poller group and injects the payload in the 'group name' parameter
payload: <script>alert('XSS')</script>
  1. Victim navigates to the 'http://localhost/addhost' to add a new host
  2. The payload is executed

code sink: https://github.com/librenms/librenms/blob/25.4.0/includes/html/pages/addhost.inc.php#L284

References