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TI-2021-19941 Aliases CVE-2021-44277GHSA-4gwh-2pqx-f5cc

Librenms 21.11.0 is affected by a Cross Site Scripting (XSS) vulnerability in includes/html/common/alert-log.inc.php.

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

Librenms 21.11.0 is affected by a Cross Site Scripting (XSS) vulnerability in includes/html/common/alert-log.inc.php.

Why it matters now

EPSS 0.00648 51st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—librenms/librenms (Packagist)up to 21.11.0—No fix listedGHSA-4gwh-2pqx-f5cc
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • librenms/librenms (Packagist) Vendor— Affected up to 21.11.0 Fixed in — No fix listed GHSA-4gwh-2pqx-f5cc

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:librenms:librenms:21.11.0:*:*:*:*:*:*:*21.11.0Vulnerablelibrenms
  • cpe:2.3:a:librenms:librenms:21.11.0:*:*:*:*:*:*:* Versions 21.11.0 Vulnerable ·librenms

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-44277
  2. 2026-10-03 Alias added: GHSA-4gwh-2pqx-f5cc
  3. 2026-10-16 EPSS moved to the 50th–90th percentile

References

Exploit 1

Advisory 1

Other 2

  • TI-2018-14479 LibreNMS 1.46 allows remote attackers to execute arbitrary OS commands by using the… CVSS 3.0CRITICAL 9.8
  • TI-2026-59134 LibreNMS before 26.8.0 Authentication Bypass via API Token Type Confusion CVSS 4.0CRITICAL 9.2
  • TI-2022-03735 Insufficient Session Expiration in librenms/librenms CVSS 3.1CRITICAL 9.8
  • TI-2022-03252 Deserialization of Untrusted Data in librenms/librenms CVSS 3.1HIGH 8.8
  • TI-2026-05445 OS command injection in librenms CVSS 4.0HIGH 8.5
  • TI-2024-34235 LibreNMS before 24.10.0 allows a remote attacker to execute arbitrary code via OS command… CVSS 3.1CRITICAL 9.1
See all 105 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences