Improper Access Control

github.com/mattermost/mattermost-server is vulnerable to Improper Access Control. The vulnerability exists because the library fails to delete the attachments when deleting messages in a thread, allowing a user to access and download the attachment of a deleted message...

CVE-2023-4105 Attachment of deleted message in a thread remains accessible and downloadable

Mattermost fails to delete the attachments when deleting a message in a thread allowing a simple user to still be able to access and download the attachment of a deleted message...