Description
LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 24.10.0 through 26.1.1 are vulnerable to Stored XSS via the unit parameter in Custom OID. The Custom OID functionality lacks strip_tags() sanitization while other fields (name, oid, datatype) are sanitized. The unsanitized value is stored in the database and rendered without HTML escaping. This issue is fixed in version 26.2.0.
Scores
CVSS v3
5.4
EPSS
0.0000
EPSS Percentile
0.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
CWE-116
Status
published
Products (2)
librenms/librenms
24.10.0 - 26.2.0Packagist
librenms/librenms
24.10.0 - 26.2.0
Published
Feb 20, 2026
Tracked Since
Feb 20, 2026