An Important Message from Bala Sathiamurthy, Chief Information Security Officer (CISO)

As part of our continuous security assessment processes, we have discovered that Confluence Data Center and Server customers are vulnerable to significant data loss if exploited by an unauthenticated attacker. There are no reports of active exploitation at this time; however, customers must take immediate action to protect their instances. Please read the Critical Security Advisory below for instructions and vulnerability details.

Protecting customers' instances is our top priority, and our prompt response demonstrates our dedication to ensuring the safety of our customers and your data. Atlassian is always reviewing security measures to reduce security risks and support our customers in taking timely action. Customers can expect to receive high-priority patches outside of our monthly advisory schedule as necessary. We believe that taking proactive action is the best approach and we appreciate your ongoing partnership.

Atlassian Cloud sites are not affected by this vulnerability. If your Confluence site is accessed via an atlassian.net domain, it is hosted by Atlassian and is not vulnerable to this issue.

This Improper Authorization vulnerability affects all versions prior to the listed fix versions of Confluence Data Center and Server. Atlassian recommends patching to the fixed LTS version or later.