CVE-2021-44277

MEDIUMNVD 6.16.1—

6.1

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

CVSS v3: 6.1
EG Score: 6.1(medium)
EPSS: 0.1%
KEV: Not listed

Published

December 1, 2021

Last Modified

November 21, 2024

References (2)

cve@mitrehttps://github.com/librenms/librenms/pull/13554
af854a3a-2127-422b-91ae-364da2661108https://github.com/librenms/librenms/pull/13554

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
composer	librenms/librenms	—	ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

Packagist(1)

Package	Vulnerable range	Fixed in	Dependents
librenms/librenms	1.19 ... 21.9.1 (86 versions)	—	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-79Cross-site Scripting (XSS)

Data Freshness Timeline

(refreshed 7× in last 7d / 11× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 07:00 UTCEG score recompute
2026-05-26 07:00 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-44277?

CVE-2021-44277 is a medium vulnerability published on December 1, 2021. Librenms 21.11.0 is affected by a Cross Site Scripting (XSS) vulnerability in includes/html/common/alert-log.inc.php.

When was CVE-2021-44277 disclosed?

CVE-2021-44277 was first published in the National Vulnerability Database on December 1, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-44277 actively exploited?

CVE-2021-44277 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-44277?

CVE-2021-44277 has a CVSS v3 base score of 6.1 (NVD).

How do I remediate CVE-2021-44277?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-44277, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-44277

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CVE-2021-44277

Published

Last Modified

References (2)

Patch Availability(1)

Affected Packages

Weakness Classification(1)

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-44277?

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CVE-2021-44277

📅 Published

🔄 Last Modified

🔗 References (2)

Patch Availability(1)

Affected Packages

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-44277?

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Frequently asked(5)

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