CVE-2022-3561Network attack vector

Stored XSS via unescaped alert-rule map labels

Published Nov 20, 2022 · Updated Apr 29, 2025

Stored XSS in LibreNMS before 22.10.0 allows remote authenticated users to execute JavaScript in another user's browser. The alert-rules renderer inserts stored location, device-group, and device names into link text and attributes without HTML encoding. An administrator must view the affected alert-rules page; the script then runs in that user's session and can read or alter application data.

CVSS severity4.3
Medium
EPSS probability0.54%
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 22.10.0 allows remote authenticated users to execute JavaScript in another user's browser. The alert-rules renderer inserts stored location, device-group, and device names into link text and attributes without HTML encoding. An administrator must view the affected alert-rules page; the script then runs in that user's session and can read or alter application data.

The record

CVE
CVE-2022-3561
Published
Nov 20, 2022
Updated
Apr 29, 2025
Vendor
LibreNMS
Product
LibreNMS
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 20, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 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=unspecified <22.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

LibreNMS · LibreNMSversion=unspecified <22.10.0

Published CVSS scores

4.3huntr.devCVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L
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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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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