CVE-2021-1879

This issue was addressed by improved management of object lifetimes. This issue is fixed in iOS 12.5.2, iOS 14.4.2 and iPadOS 14.4.2, watchOS 7.3.3. Processing maliciously crafted web content may lead to universal cross site scripting. Apple is aware of a report that this issue may have been actively exploited..

• CWE-79
• CWE-79

• https://support.apple.com/en-us/HT212256Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212257Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212258Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212256Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212257Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212258Release Notes, Vendor Advisory
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1879US Government Resource

Published

Apr 2, 2021

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-1873An API issue in Accessibility TCC permissions was addressed …6.5
• CVE-2021-1874A logic issue was addressed with improved state management. …8.8
• CVE-2021-1875A double free issue was addressed with improved memory manag…7.8
• CVE-2021-1876A use after free issue was addressed with improved memory ma…8.8
• CVE-2021-1877An out-of-bounds read was addressed with improved input vali…5.5
• CVE-2021-1878An integer overflow was addressed with improved input valida…6.5
• CVE-2021-1880This issue was addressed with improved checks. This issue is…7.8
• CVE-2021-1881An out-of-bounds read was addressed with improved input vali…7.8
• CVE-2021-1882A memory corruption issue was addressed with improved valida…9.8
• CVE-2021-1883This issue was addressed with improved checks. This issue is…5.5
• CVE-2021-1884A race condition was addressed with improved locking. This i…5.9
• CVE-2021-1885An out-of-bounds read was addressed with improved bounds che…7.8