Bitbucket Server and Bitbucket Data Center from version 4.13. before 5.16.11, from version 6.0.0 before 6.0.11, from version 6.1.0 before 6.1.9, from version 6.2.0 before 6.2.7, from version 6.3.0 before 6.3.6, from version 6.4.0 before 6.4.4, from version 6.5.0 before 6.5.3, from version 6.6.0 before 6.6.3, from version 6.7.0 before 6.7.3, from version 6.8.0 before 6.8.2, from version 6.9.0 before 6.9.1 had a Remote Code Execution vulnerability via the edit-file request. A remote attacker with write permission on a repository can write to any arbitrary file to the victims Bitbucket Server or Bitbucket Data Center instance using the edit-file endpoint, if the user has Bitbucket Server or Bitbucket Data Center running, and has the permission to write the file at that destination. In some cases, this can result in execution of arbitrary code by the victims Bitbucket Server or Bitbucket Data Center instance.

The commit diff rest endpoint in Bitbucket Server and Data Center before 5.16.10 (the fixed version for 5.16.x ), from 6.0.0 before 6.0.10 (the fixed version for 6.0.x), from 6.1.0 before 6.1.8 (the fixed version for 6.1.x), from 6.2.0 before 6.2.6 (the fixed version for 6.2.x), from 6.3.0 before 6.3.5 (the fixed version for 6.3.x), from 6.4.0 before 6.4.3 (the fixed version for 6.4.x), and from 6.5.0 before 6.5.2 (the fixed version for 6.5.x) allows remote attackers who have permission to access a repository, if public access is enabled for a project or repository then attackers are able to exploit this issue anonymously, to read the contents of arbitrary files on the system and execute commands via injecting additional arguments into git commands.

Bitbucket Server and Bitbucket Data Center versions starting from version 3.0.0 before version 5.16.11, from version 6.0.0 before 6.0.11, from version 6.1.0 before 6.1.9, from version 6.2.0 before 6.2.7, from version 6.3.0 before 6.3.6, from version 6.4.0 before 6.4.4, from version 6.5.0 before 6.5.3, from version 6.6.0 before 6.6.3, from version 6.7.0 before 6.7.3, from version 6.8.0 before 6.8.2, and from version 6.9.0 before 6.9.1 had a Remote Code Execution vulnerability via certain user input fields. A remote attacker with user level permissions can exploit this vulnerability to run arbitrary commands on the victim's systems. Using a specially crafted payload as user input, the attacker can execute arbitrary commands on the victim's Bitbucket Server or Bitbucket Data Center instance.

Bitbucket Server and Bitbucket Data Center versions starting from 1.0.0 before 5.16.11, from version 6.0.0 before 6.0.11, from version 6.1.0 before 6.1.9, from version 6.2.0 before 6.2.7, from version 6.3.0 before 6.3.6, from version 6.4.0 before 6.4.4, from version 6.5.0 before 6.5.3, from version 6.6.0 before 6.6.3, from version 6.7.0 before 6.7.3, from version 6.8.0 before 6.8.2, from version 6.9.0 before 6.9.1 had a Remote Code Execution vulnerability via the post-receive hook. A remote attacker with permission to clone and push files to a repository on the victim's Bitbucket Server or Bitbucket Data Center instance, can exploit this vulnerability to execute arbitrary commands on the Bitbucket Server or Bitbucket Data Center systems, using a file with specially crafted content.

Atlassian Bitbucket Data Center licensed instances starting with version 5.13.0 before 5.13.6 (the fixed version for 5.13.x), from 5.14.0 before 5.14.4 (fixed version for 5.14.x), from 5.15.0 before 5.15.3 (fixed version for 5.15.x), from 5.16.0 before 5.16.3 (fixed version for 5.16.x), from 6.0.0 before 6.0.3 (fixed version for 6.0.x), and from 6.1.0 before 6.1.2 (the fixed version for 6.1.x) allow remote attackers who have admin permissions to achieve remote code execution on a Bitbucket server instance via path traversal through the Data Center migration tool.