PdfDing is a selfhosted PDF manager, viewer and editor offering a seamless user experience on multiple devices. Prior to version 1.7.0, an access-control vulnerability allows unauthenticated users to retrieve password-protected shared PDFs by directly calling the file-serving endpoint without completing the password verification flow. This results in unauthorized access to confidential documents that users expected to be protected by a shared-link password. This issue has been patched in version 1.7.0.
https://github.com/mrmn2/PdfDing/security/advisories/GHSA-42x7-vvj4-4cj3
https://github.com/mrmn2/PdfDing/releases/tag/v1.7.0
https://github.com/mrmn2/PdfDing/pull/294
https://github.com/mrmn2/PdfDing/commit/ae579ea98c5603d1435e0d90e81d72151564088a