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Fencer Vulns
medium 4.8

CVE-2024-49758 json

LibreNMS has a stored XSS in ExamplePlugin with Device's Notes

published 2024-11-15 23 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-3233 , GHSA-c86q-rj37-8f85

cvss
4.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

LibreNMS is an open-source, PHP/MySQL/SNMP-based network monitoring system. User with Admin role can add Notes to a device, the application did not properly sanitize the user input, when the ExamplePlugin enable, if java script code is inside the device's Notes, its will be trigger. This vulnerability is fixed in 24.10.0.

Patch / fix

  • packagist librenms/librenms 24.10.0
  • librenms librenms 24.10.0

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
23 mo ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/librenms/librenms/security/advisories/GHSA-c86q-rj37-8f85 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
GitHub 3.1 6.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
packagist librenms/librenms
<24.10.0
24.10.0

Affected products

  • librenms librenms

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.