CVE-2026-53673

BuddyPress version 14.4.0 has a security flaw in its messages REST API that can be exploited by authenticated users. This vulnerability allows attackers to access private conversations of other users by manipulating the user_id parameter in requests. The issue arises from the fact that the get_item_permissions_check method checks the supplied user ID rather than the currently logged-in user, which is then used by update and delete handlers to manipulate messages.

Based on public CVE data (MITRE/NVD).