MantisBT has an authorization bypass that allows reading attachments after losing access to a private issue

MantisBT permits a user to list and download their own attachments from an Issue created by another user, even after that Issue becomes private and direct access to it is denied.

Impact

The loss of confidentiality caused by this vulnerability is minimal, considering that only the attachments that were previously uploaded by the user themselves remains accessible.

Patches

• de7bdeec36de066235e38a77bf056917d951c84d

Workarounds

None.

Credits

Thanks to Vishal Shukla for discovering and responsibly reporting the issue.