CVE-2025-55296 json
LibreNMS allows stored XSS in Alert Template name field
published last yr. modified 4mo ago also EUVD-2025-25142 , GHSA-vxq6-8cwm-wj99
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 18.0%
- EPSS 18.0% chance of exploitation in 30 days, percentile 97%
- public exploits
- 0
- none known
Summary
librenms is a community-based GPL-licensed network monitoring system. A stored Cross-Site Scripting (XSS) vulnerability exists in LibreNMS (<= 25.6.0) in the Alert Template creation feature. This allows a user with the admin role to inject malicious JavaScript, which will be executed when the template is rendered, potentially compromising other admin accounts. This vulnerability is fixed in 25.8.0.
Patch / fix
- packagist librenms/librenms 25.8.0
- librenms librenms 25.8.0
Is CVE-2025-55296 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
18.02% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/librenms/librenms/security/advisories/GHSA-vxq6-8cwm-wj99 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 5.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | librenms/librenms | <25.8.0 |
25.8.0 |
Affected products
- librenms librenms
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/librenms/librenms/commit/8ade3d827d317f5ac4b336617aafff865f825958
web, patch
-
github.com
/librenms/librenms/security/advisories/GHSA-vxq6-8cwm-wj99
web, exploit, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-55296
advisory
-
github.com
/librenms/librenms
package
Sources
- CVE List CVE-2025-55296
- GitHub Advisory GHSA-vxq6-8cwm-wj99
- NVD CVE-2025-55296
Fencer Intel 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.