CVE-2024-47523Public exploitNetwork attack vector

Session compromise via unescaped alert transport details

Published Oct 1, 2024 · Updated Oct 2, 2024

Stored XSS in LibreNMS before 24.9.0 allows remote authenticated users to run JavaScript in other users' sessions through alert details. The alert-transport list passes displayDetails() through nl2br() and appends it directly to HTML without entity encoding, so stored fields become executable markup. An authenticated user with alert-transport creation access must save a crafted Details value, and another user must view or process the transport for session-context actions.

CVSS severity7.5
High
EPSS probability0.63%
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 24.9.0 allows remote authenticated users to run JavaScript in other users' sessions through alert details. The alert-transport list passes displayDetails() through nl2br() and appends it directly to HTML without entity encoding, so stored fields become executable markup. An authenticated user with alert-transport creation access must save a crafted Details value, and another user must view or process the transport for session-context actions.

The record

CVE
CVE-2024-47523
Published
Oct 1, 2024
Updated
Oct 2, 2024
Vendor
LibreNMS
Product
LibreNMS
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 2024Record 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=0 <24.9.0
  2. Affected versionversion=< 24.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

LibreNMS · LibreNMSversion=0 <24.9.0; version=< 24.9.0

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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