{"id":"CVE-2021-30943","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-30943","generatedAt":"2026-10-27T21:20:18.731Z","title":"A malicious user may be able to leave a messages group but continue to receive messages in that group.","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.","published":"2021-08-24T19:15:21.000Z","lastModified":"2026-06-17T03:51:11.000Z","status":"Modified","sourceIdentifier":"product-security@apple.com","cvss":{"version":"3.1","score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-613"],"affected":["apple/ipados","apple/iphone os","apple/macos","apple/watchos"],"epss":{"score":0.00802,"percentile":0.56371,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.80%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://support.apple.com/en-us/HT212975","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212976","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212978","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212975","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212976","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212978","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-30943","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}