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Vulnerability details: VCID-q6u9-mpr9-8qd2
Vulnerability ID VCID-q6u9-mpr9-8qd2
Aliases CVE-2021-44279
GHSA-5vr6-hm68-5j9p
Summary Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Librenms is affected by a Cross Site Scripting (XSS) vulnerability in `includes/html/forms/poller-groups.inc.php`.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 3e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-44279
epss 3e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-44279
epss 3e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-44279
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-5vr6-hm68-5j9p
cvssv3.1 6.1 https://github.com/librenms/librenms
generic_textual MODERATE https://github.com/librenms/librenms
cvssv3.1 6.1 https://github.com/librenms/librenms/pull/13554
generic_textual MODERATE https://github.com/librenms/librenms/pull/13554
cvssv3.1 6.1 https://github.com/librenms/librenms/pull/13554/commits/4f231a0f49b6c953d506913364ffd7fb3a660630
generic_textual MODERATE https://github.com/librenms/librenms/pull/13554/commits/4f231a0f49b6c953d506913364ffd7fb3a660630
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2021-44279
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-44279
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-44279
https://github.com/librenms/librenms
https://github.com/librenms/librenms/pull/13554
https://github.com/librenms/librenms/pull/13554/commits/4f231a0f49b6c953d506913364ffd7fb3a660630
CVE-2021-44279 https://nvd.nist.gov/vuln/detail/CVE-2021-44279
GHSA-5vr6-hm68-5j9p https://github.com/advisories/GHSA-5vr6-hm68-5j9p
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/librenms/librenms
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/librenms/librenms/pull/13554
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/librenms/librenms/pull/13554/commits/4f231a0f49b6c953d506913364ffd7fb3a660630
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-44279
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.00096
EPSS Score 3e-05
Published At June 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-02T04:40:37.020818+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/librenms/librenms/CVE-2021-44279.yml 38.6.0