WC Vendors < 2.7.2.1 - Vendor+ Cross-Vendor Product and Arbitrary Post Modification via IDOR

The WC Vendors WordPress plugin before 2.7.2.1 does not verify ownership or the object type of user-supplied IDs when saving product variations, allowing authenticated users with the vendor role to modify product variations belonging to other vendors, and to change the status and title of arbitrary posts, via IDOR.