What’s Vulnerable › Vulnerabilities

CVE-2020-16157

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 14.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-07-30 · updated 2026-06-17
• Weakness: CWE-79

Description

A Stored XSS vulnerability exists in Nagios Log Server before 2.1.7 via the Notification Methods -> Email Users menu.

Affected products

• Nagios Log Server: before 2.1.7 — fixed in 2.1.7

How to fix

Upgrade to a fixed version: Nagios Log Server 2.1.7. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/158992/Nagios-Log-Server-2.1.6-Cross-Site-Scripting.html
• https://www.getastra.com/blog/911/stored-xss-vulnerability-nagios-log-server/
• https://www.jinsonvarghese.com/stored-xss-vulnerability-in-nagios-log-server/
• https://www.nagios.com/downloads/nagios-log-server/change-log/
• http://packetstormsecurity.com/files/158992/Nagios-Log-Server-2.1.6-Cross-Site-Scripting.html
• https://www.getastra.com/blog/911/stored-xss-vulnerability-nagios-log-server/
• https://www.jinsonvarghese.com/stored-xss-vulnerability-in-nagios-log-server/
• https://www.nagios.com/downloads/nagios-log-server/change-log/

Get alerted when CVE-2020-16157 or the next vulnerability affects your stack