Affected versions of Atlassian Confluence Server and Data Center allow remote attackers who have read permissions to a page, but not write permissions, to upload attachments via a Broken Access Control vulnerability in the attachments feature.

The affected versions are before version 7.13.17, from version 7.14.0 before 7.19.9, and from version 7.20.0 before 8.2.2.

This vulnerability was discovered by Rojan Rijal of the Tinder Security Engineering Team.

Affected versions:

• version < 7.13.17
• 7.14.0 ≤ version < 7.19.9
• 7.20.0 ≤ version < 8.2.2

Fixed versions:

• 7.13.17
• 7.19.9
• 8.2.2
• 8.3.0