ClipBucket v5 is an open source video sharing platform. Prior to version 5.5.3 - #133, a normal authenticated user can edit another user's video subtitles because of a lack of authorization. They can upload subtitles, edit their name or delete them. This issue has been patched in version 5.5.3 - #133.
https://github.com/MacWarrior/clipbucket-v5/security/advisories/GHSA-x468-whmw-c863