CVE-2021-1879

Known Exploited

Description

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..

References

Link	Tags
https://support.apple.com/en-us/HT212256	release notes vendor advisory
https://support.apple.com/en-us/HT212257	release notes vendor advisory
https://support.apple.com/en-us/HT212258	release notes vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-1879?: CVE-2021-1879 has been scored as a medium severity vulnerability.
How to fix CVE-2021-1879?: To fix CVE-2021-1879, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-1879 being actively exploited in the wild?: It is confirmed that CVE-2021-1879 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-1879?: CVE-2021-1879 affects Apple iOS and iPadOS, Apple iOS, Apple watchOS.

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Description

Category

CWE-79 – Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References

Frequently Asked Questions