TI-2021-14218 Aliases CVE-2021-35478 GHSA-9q74-9jcx-243m

Nagios Log Server before 2.1.9 contains Reflected XSS in the dropdown box for the alert…

MEDIUM 64CWE-79Published 2021-07-27 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: Low
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. Impact type from CWE-79.

Summary

Nagios Log Server before 2.1.9 contains Reflected XSS in the dropdown box for the alert history and audit log function. All parameters used for filtering are affected. This affects users who open a crafted link or third-party web page.

Why it matters now

EPSS 0.76624 99th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:nagios:log_server::::::::	before 2.1.9	Vulnerable	Nagios

cpe:2.3:a:nagios:log_server:*:*:*:*:*:*:*:* Versions before 2.1.9 Vulnerable ·Nagios

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-35478
2026-10-03 Alias added: GHSA-9q74-9jcx-243m

References

Exploit 1

https://research.nccgroup.com/2021/07/22/technical-advisory-stored-and-reflected-xss-vulnerability-in-nagios-log-server-cve-2021-35478cve-2021-35479/

Advisory 2

TI-2025-21095 Cross Site Scripting vulnerability in Nagios Log Server v.2024R1.3.1 allows a remote… CVSS 3.1HIGH 8.3
TI-2025-28646 Nagios Log Server before 2024R1.3.2 allows authenticated users to retrieve cleartext… CVSS 3.1CRITICAL 9.9
TI-2025-28647 Incorrect authorization in Nagios Log Server CVSS 3.1HIGH 8.5
TI-2025-24416 Nagios Log Server < 2024R1.3.1 RCE via Malformed Dashboard ID CVSS 4.0CRITICAL 9.4
TI-2025-24454 Nagios Log Server < 2026R1.0.1 Authenticated Command Injection via Natural Language Queries CVSS 4.0HIGH 8.6
TI-2023-06689 Nagios Log Server < 2024R1 Incorrect Authorization Granting Full API Access CVSS 4.0HIGH 8.7

See all 22 →

Sources

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