Atlassian Confluence Server and Data Center Path Traversal Vulnerability

A remote attacker, with a low-privilege account, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2022-05-03 under CISA BOD 22-01.

This is a Path Traversal (CWE-22) vulnerability in Atlassian Confluence Server and Data Center. Confluence Server and Data Center had a path traversal vulnerability in the downloadallattachments resource. A remote attacker who has permission to add attachments to pages and / or blogs or to create a new space or a personal space or who has 'Admin' permissions for a space can exploit this path traversal vulnerability to write files to arbitrary locations which can lead to remote code execution on systems that run a vulnerable version of Confluence Server or Data Center. All versions of Confluence Server from 2.0.0 before 6.6.13 (the fixed version for 6.6.x), from 6.7.0 before 6.12.4 (the fixed version for 6.12.x), from 6.13.0 before 6.13.4 (the fixed version for 6.13.x), from 6.14.0 before 6.14.3 (the fixed version for 6.14.x), and from 6.15.0 before 6.15.2 are affected by this vulnerability. Exploitation requires remote network access, low attack complexity, a low-privilege authenticated account, and no user interaction required.

Probably yes if any of these apply:

Active exploitation documented in the wild. Threat-research write-up: http://packetstormsecurity.com/files/155235/Atlassian-Confluence-6.15.1-Directory-Traversal.html