CVE-2025-47931Public exploitNetwork attack vector

Stored script execution via unescaped poller group name

Published May 17, 2025 · Updated May 19, 2025

Stored XSS in LibreNMS before 25.5.0 allows remote attackers to execute scripts in another user's browser through a poller group name. The add-host page reads group_name values from poller_groups and inserts them into option elements without HTML encoding. Exploitation requires distributed polling to be enabled and a victim to open the add-host page, where the script runs in that user's browser context.

CVSS severity6.1
Medium
EPSS probability11.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in LibreNMS before 25.5.0 allows remote attackers to execute scripts in another user's browser through a poller group name. The add-host page reads group_name values from poller_groups and inserts them into option elements without HTML encoding. Exploitation requires distributed polling to be enabled and a victim to open the add-host page, where the script runs in that user's browser context.

The record

CVE
CVE-2025-47931
Published
May 17, 2025
Updated
May 19, 2025
Vendor
LibreNMS
Product
LibreNMS
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 17, 2025CVE publishedPublication date reported by the CVE source.
  2. May 19, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 25.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LibreNMS · LibreNMSversion=< 25.5.0

Published CVSS scores

2.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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