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CVE-2021-1879 Cross site scripting

Immediate
Remediate Within 48 Hours

CVE Information

Original CVE data

Published:
Updated:

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: CWE-79
CVSS v24.3
AV:N/AC:M/AU:N/C:N/I:P/A:N
CVSS v36.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
References
https://support.apple.com/en-us/HT212256
https://support.apple.com/en-us/HT212257
https://support.apple.com/en-us/HT212258
Affected Vendors

Apple - (3)

Basic Analysis

Common vulnerability metrics

Vulnerabilty type as detected by PRIOnengine

Cross site scripting

CVSS Scores as calculated by PRIOnengine
CVSS v24.3
AV:N/AC:M/AU:N/C:N/I:P/A:N
CVSS v36.1
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
MITRE CWE Top 25

Vulnerability weakness type is in the top 25 CWEs according to MITRE. View Mitre Top 25 CWEs

Exploits

Exploits are available either through exploit packs, Github repos or the world wide web in general.

Active Exploitation

Vulnerability is referenced under CISA's Known Exploited Vulnerabilities (KEV) catalog. See the KEV Catalog

Social Network Activity

Vulnerability is mentioned or trending in social media.

Threat Actor Activity

Vulnerability is being actively exploited by threat actors during campaigns.

Cybersecurity Frameworks

How the vulnerability maps against various cybersecurity frameworks

T1566.002 - Phishing (Spearphishing Link)
T1566 - Phishing
T1539 - Steal Web Session Cookie
T1190 - Exploit Public-Facing Application
T1189 - Drive-by Compromise
T1059 - Command and Scripting Interpreter

Compliance Impact

How the submited vulnerability affects compliance

PCI DSS v3.2.1-6.5.7 - Cross Site Scripting

Web Application Security Frameworks

Applicable if the issue likely affects a web application

WASC-8 - Cross Site Scripting