XSS via Audit Log Send to NLS Form in Nagios XI <5.8.7
CVE-2021-47699 Published on October 30, 2025
Nagios XI < 5.8.7 XSS in Audit Log via Send to NLS Form
Nagios XI versions prior to 5.8.7 are vulnerable to cross-site scripting (XSS) via the Audit Log pages Send to NLS form. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2021-47699 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2021-47699
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Affected Versions
Nagios XI:- Before 5.8.7 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.