CVE-2020-13959

The default error page for VelocityView in Apache Velocity Tools prior to 3.1 reflects back the vm file that was entered as part of the URL. An attacker can set an XSS payload file as this vm file in the URL which results in this payload being executed. XSS vulnerabilities allow attackers to execute arbitrary JavaScript in the context of the attacked website and the attacked user. This can be abused to steal session cookies, perform requests in the name of the victim or for phishing attacks.

velocity as shipped in Red Hat Enterprise Linux 6, 7, and 8, as well as CodeReady Studio 12, is not affected by this flaw as the affected velocity-tools code is not present in shipped products. This includes those shipped in javapackages-tools and pki-deps as well.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.