CVE-2021-22906

Issue summary: CVE-2021-22906 affects Nextcloud End-to-End Encryption before 1.5.3, 1.6.3 and 1.7.1. It allows any authenticated user to lock files of other users, creating a denial-of-service condition. Root cause (as stated): improper access control in the End-to-End Encryption app that lets au...