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Vulnerability details: VCID-t5mg-4z98-57au
Vulnerability ID VCID-t5mg-4z98-57au
Aliases CVE-2021-44277
GHSA-4gwh-2pqx-f5cc
Summary Cross-site Scripting in LibreNMS
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
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-2021-44277
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-4gwh-2pqx-f5cc
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/fff7b45a7599f8f13a55250dc5f2b957f3394194
generic_textual MODERATE https://github.com/librenms/librenms/pull/13554/commits/fff7b45a7599f8f13a55250dc5f2b957f3394194
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2021-44277
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-44277
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-44277
https://github.com/librenms/librenms/pull/13554
https://github.com/librenms/librenms/pull/13554/commits/fff7b45a7599f8f13a55250dc5f2b957f3394194
CVE-2021-44277 https://nvd.nist.gov/vuln/detail/CVE-2021-44277
GHSA-4gwh-2pqx-f5cc https://github.com/advisories/GHSA-4gwh-2pqx-f5cc
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/fff7b45a7599f8f13a55250dc5f2b957f3394194
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-2021-44277
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 0.00097
EPSS Score 3e-05
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T20:27:14.297079+00:00 GHSA Importer Import https://github.com/advisories/GHSA-4gwh-2pqx-f5cc 38.6.0