AI Score
Confidence
High
EPSS
Percentile
49.8%
SSVC
Exploitation
none
Automatable
no
Technical Impact
partial
A Cross-site scripting (XSS) vulnerability in Nagios XI version 5.11.1 and below allows authenticated attackers with access to the custom logo component to inject arbitrary javascript or HTML via the alt-text field. This affects all pages containing the navbar including the login page which means the attacker is able to to steal plaintext credentials.