VulnerabilityModified

CVE-2021-30943

A malicious user may be able to leave a messages group but continue to receive messages in that group.

MEDIUM 4.3EPSS 0.80%

Does this matter?

Lower severity and a low EPSS score (0.80%). Track it; it rarely justifies an emergency change on its own.

Description

An issue in the handling of group membership was resolved with improved logic. This issue is fixed in iOS 15.2 and iPadOS 15.2, watchOS 8.3, macOS Monterey 12.1. A malicious user may be able to leave a messages group but continue to receive messages in that group.

CVSS 3.1: 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS: 0.80% probability · 56th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-613
Affected: apple/ipados · apple/iphone os · apple/macos · apple/watchos
Source: product-security@apple.com

EPSS trend

EPSS 0.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.