6.1

CVE-2021-1879

Warning

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..

Data is provided by the National Vulnerability Database (NVD)
Apple ≫ iPadOS Version < 14.4.2
Apple ≫ iPhone OS Version < 12.5.2
Apple ≫ iPhone OS Version >= 13.0 < 14.4.2
Apple ≫ watchOS Version < 7.3.3

03.11.2021: CISA Known Exploited Vulnerabilities (KEV) Catalog

Apple iOS, iPadOS, and watchOS WebKit Cross-Site Scripting (XSS) Vulnerability

Vulnerability

Apple iOS, iPadOS, and watchOS WebKit contain an unspecified vulnerability that allows for universal cross-site scripting (XSS) when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

Description

Apply updates per vendor instructions.

Required actions
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 1.77% 0.819
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 6.1 2.8 2.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
nvd@nist.gov 4.3 8.6 2.9
AV:N/AC:M/Au:N/C:N/I:P/A:N
134c704f-9b21-4f2e-91b3-4a467353bcc0 6.1 2.8 2.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

https://support.apple.com/en-us/HT212256
Vendor Advisory
Release Notes
https://support.apple.com/en-us/HT212257
Vendor Advisory
Release Notes
https://support.apple.com/en-us/HT212258
Vendor Advisory
Release Notes