CVE-2021-1771

This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave. A user that is removed from an iMessage group could rejoin the group...

CVE-2021-1771

CVE-2021-1771 affects Apple macOS Messages/iMessage group handling. The issue allowed a user removed from an iMessage group to rejoin the group, indicating a logic/permission flaw in group membership management. Apple fixed this in macOS Big Sur 11.2 and Security Update 2021-001 for Catalina and ...