An exploitable CSRF vulnerability exists in Atlassian Jira, from versions 7.6.4 to 8.1.0. The login form doesn’t require a CSRF token. As a result, an attacker can log a user into the system under an unexpected account.
The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.