What’s Vulnerable › Vulnerabilities

CVE-2020-10821

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 71.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-03-22 · updated 2026-06-17
• Weakness: CWE-79

Description

Nagios XI 5.6.11 allows XSS via the account/main.php theme parameter.

Affected products

• Nagios XI: 5.6.11

References

• https://code610.blogspot.com/2020/03/nagios-5611-xssd.html
• https://code610.blogspot.com/2020/03/nagios-5611-xssd.html

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