A flaw was found in HashiCorp Vault and Vault Enterprise, where they are vulnerable to Cross-site scripting caused by improper validation of user-supplied input by the key-value v2 (kv-v2) diff viewer. A remote, authenticated attacker can inject malicious script into a Web page which would be executed in a victim's Web browser within the security context of the hosting Web site once the page is viewed. This flaw allows an attacker to steal the victim's cookie-based authentication credentials.