CVE-2016-15049: Nagios Log Server < 1.4.2 Dashboards Logs Table XSS

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-30 · updated 2026-10-18
Weakness: CWE-79

Description

Nagios Log Server versions prior to 1.4.2 are vulnerable to cross-site scripting (XSS) in the Dashboards section when rendering log entries in the Logs table. Untrusted log content was not safely encoded for the output context, allowing attacker-controlled data present in logs to execute script in the victim’s browser within the application origin.

Affected products

Nagios Log Server: before 1.4.2 — fixed in 1.4.2

How to fix

Upgrade to a fixed version: Nagios Log Server 1.4.2. Check the vendor advisory for mitigations.

References

https://www.nagios.com/changelog/nagios-log-server-2024r1/
https://www.vulncheck.com/advisories/nagios-log-server-dashboards-logs-table-xss

Get alerted when CVE-2016-15049 or the next vulnerability affects your stack