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..

Affected

Apple · iOS and iPadOS · iOS · watchOS

CVSS v3.1 NVD

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v2.0 NVD

4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N

EPSS

7.08% chance of exploitation in the next 30 days, 94th percentile

CISA KEV

added 2021-11-03

Published

2021-04-02

Updated

2025-10-21

Proof-of-concept exploits (1)

• Nazky/PS4CVE202118790★ · 2021-10-12

Security advisories

• https://support.apple.com/en-us/HT212256
• https://support.apple.com/en-us/HT212257
• https://support.apple.com/en-us/HT212258

References

• CVE Record
• NVD entry

Related

• CVE-2021-30858