LibreNMS stored Cross-site Scripting vulnerability in poller group name

MEDIUM 6.1CVE-2025-47931 · GHSA-hxw5-9cc5-cmw5 · Published 17/05/2025 · updated 17/06/2026

In short

CVE-2025-47931 is a MEDIUM (CVSS 6.1) vulnerability affecting librenms/librenms, librenms (librenms).
Chance of exploitation in the next 30 days (EPSS): 10.1%, higher than 95.6% of all vulnerabilities.
Fix: update to 25.5.0 or later.

Package	Affected versions	Patched versions
librenms/librenms Packagist	`< 25.5.0`	`25.5.0`
librenms librenms	`< 25.5.0`	`25.5.0`

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

Attacker creates a new poller group and injects the payload in the 'group name' parameter

payload: <script>alert('XSS')</script>

Victim navigates to the 'http://localhost/addhost' to add a new host
The payload is executed

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

NVD description

LibreNMS is PHP/MySQL/SNMP based network monitoring software. LibreNMS v25.4.0 and prior suffers from a 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. LibreNMS v25.5.0 contains a patch for the issue.

References

librenms/librenms security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2025-47931 · ADVISORY
librenms/librenms#17603 · WEB
librenms/librenms commit 88fe1a7 · WEB
librenms/librenms · PACKAGE
librenms/librenms · WEB

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Package

Affected versions

Patched versions

librenms/librenms

Packagist

< 25.5.0

25.5.0

librenms

< 25.5.0

25.5.0

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

Attacker creates a new poller group and injects the payload in the 'group name' parameter

payload: <script>alert('XSS')</script>

Victim navigates to the 'http://localhost/addhost' to add a new host
The payload is executed

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

NVD description

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