CRITICAL ATLASSIAN CONFLUENCE FLAW CAN LEAD TO SIGNIFICANT DATA LOSS

Summary from the TLDR InfoSec newsletter

Atlassian has issued a warning about a critical security vulnerability affecting all versions of Confluence Data Center and Server, which could lead to significant data loss if exploited by an unauthenticated attacker. The vulnerability is an improper authorization issue. Atlassian is not aware of any attacks exploiting this vulnerability but urges customers to take immediate action to protect their installs.