We’ve just released Jira 3.13.1, a small but important update to Jira 3.13.
We’ve closed a some 41issues with 3.13.1, most importantly JRA-15733,an XSS (cross-site scripting) vulnerability. You can read about the security fix, and all the other fixes, in the Jira 3.13.1 Release Notes. And you can download the release in our Jira Download Center.

Jira 3.13.1 released, with an important security update