Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
In Apache ActiveMQ Artemis up to 2.13.0, a specially crafted MQTT packet which has an XSS payload as client-id or topic name can exploit this vulnerability. The XSS payload is being injected into the admin console's browser. The XSS payload is triggered in the diagram plugin; queue node and the info section.
CWE-79 - Cross Site Scripting
Cross-Site Scripting, commonly referred to as XSS, is the most dominant class of vulnerabilities. It allows an attacker to inject malicious code into a pregnable web application and victimize its users. The exploitation of such a weakness can cause severe issues such as account takeover, and sensitive data exfiltration. Because of the prevalence of XSS vulnerabilities and their high rate of exploitation, it has remained in the OWASP top 10 vulnerabilities for years.