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..
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
appleCNA
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CVEADP
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CISA-ADPADP
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 82%
VendorProductVersion
appleipados
𝑥
< 14.4.2
appleiphone_os
𝑥
< 12.5.2
appleiphone_os
13.0 ≤
𝑥
< 14.4.2
applewatchos
𝑥
< 7.3.3
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://support.apple.com/en-us/HT212256
https://support.apple.com/en-us/HT212257
https://support.apple.com/en-us/HT212258
https://support.apple.com/en-us/HT212256
https://support.apple.com/en-us/HT212257
https://support.apple.com/en-us/HT212258