CVE-2021-1771

LOW

macOS 10.14-10.14.5 and 11.0-11.1 - Unauthenticated iMessage Group Rejoin

Title source: llm

Description

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.

References (1)

Core 1

Core References

Release Notes, Vendor Advisory x_refsource_misc

https://support.apple.com/en-us/HT212147

Scores

CVSS v3 3.3

EPSS 0.0055

EPSS Percentile 42.2%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Details

Status published

Products (4)

apple/mac_os_x 10.14.6 (12 CPE variants)

apple/mac_os_x 10.15.7 (2 CPE variants)

apple/mac_os_x 10.14 - 10.14.6

apple/macos 11.0 - 11.2

Published Apr 02, 2021

Tracked Since Feb 18, 2026