trashserver.net was also affected by this security issue: https://github.com/ThomasLeister/prosody-filer/security/advisories/GHSA-qmfx-75ff-8mw6
The bug was fixed a few minutes ago, and an up to date version was deloyed on trashserver.net.
If you use OMEMO encrypted conversations, there's nothing to worry about.
If you didn't, there's a (low) probability that someone could have checked out which files you uploaded / shared.
Please use OMEMO whenever possible to prevent any software bugs on the server side to be effective.