PwnDoc is a penetration test reporting application. Prior to version 1.2.0, the backup restore functionality is vulnerable to path traversal in the TAR entry's name, allowing an attacker to overwrite any file on the system with their content. By overwriting an included `.js` file and restarting the container, this allows for Remote Code Execution as an administrator. The remote code execution occurs because any user with the `backups:create` and `backups:update` (only administrators by default) is able to overwrite any file on the system. Version 1.2.0 fixes the issue.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.