CVE-2021-44277 json
Cross-site Scripting in LibreNMS
published 2021-12-01 4 y ago modified 2026-06-17 4 mo ago also GHSA-4gwh-2pqx-f5cc , EUVD-2021-2438
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
Librenms 21.11.0 is affected by a Cross Site Scripting (XSS) vulnerability in includes/html/common/alert-log.inc.php.
Patch / fix
- github.com/librenms/librenms#13554 commit
- github.com/librenms/librenms#13554 pull request
Exploit prediction
0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/librenms/librenms/pull/13554 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | librenms/librenms | <=21.11.0 |
no fix listed |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/librenms/librenms/pull/13554
web, exploit, issue-tracking, patch, third-party-advisory
-
github.com
/librenms/librenms/pull/13554/commits/fff7b45a7599f8f13a55250dc5f2b957f3394194
web
-
nvd.nist.gov
/vuln/detail/CVE-2021-44277
advisory
-
github.com
/librenms/librenms
web
Sources
- CVE List CVE-2021-44277
- GitHub Advisory GHSA-4gwh-2pqx-f5cc
- NVD CVE-2021-44277
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.