CVE-2021-30744

webkitgtk: Cross-origin issue with iframe elements leading to universal cross site scripting attack

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Description: A cross-origin issue with iframe elements was addressed with improved tracking of security origins. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Safari 14.1.1, macOS Big Sur 11.4, watchOS 7.5. Processing maliciously crafted web content may lead to universal cross site scripting.

Descripción: Se abordó un problema de origen cruzado con elementos iframe con un seguimiento de los orígenes de seguridad mejorados. Este problema se corrigió en tvOS versión 14.6, iOS versión 14.6 e iPadOS versión 14.6, Safari versión 14.1.1, macOS Big Sur versión 11.4, watchOS versión 7.5. El procesamiento de contenido web maliciosamente diseñado puede conllevar un cross site scripting universal

macOS Big Sur 11.4 addresses buffer overflow, bypass, code execution, cross site scripting, denial of service, information leakage, null pointer, out of bounds read, out of bounds write, path sanitization, and use-after-free vulnerabilities.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-04-13 CVE Reserved
2021-05-26 CVE Published
2024-08-03 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

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

CAPEC

References (7)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://support.apple.com/en-us/HT212528	2023-01-09
https://support.apple.com/en-us/HT212529	2023-01-09
https://support.apple.com/en-us/HT212532	2023-01-09
https://support.apple.com/en-us/HT212533	2023-01-09
https://support.apple.com/en-us/HT212534	2023-01-09
https://access.redhat.com/security/cve/CVE-2021-30744	2021-11-09
https://bugzilla.redhat.com/show_bug.cgi?id=1986888	2021-11-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Apple Search vendor "Apple"		Safari Search vendor "Apple" for product "Safari"				< 14.1.1 Search vendor "Apple" for product "Safari" and version " < 14.1.1"		-		Affected
Apple Search vendor "Apple"		Ipados Search vendor "Apple" for product "Ipados"				< 14.6 Search vendor "Apple" for product "Ipados" and version " < 14.6"		-		Affected
Apple Search vendor "Apple"		Iphone Os Search vendor "Apple" for product "Iphone Os"				< 14.6 Search vendor "Apple" for product "Iphone Os" and version " < 14.6"		-		Affected
Apple Search vendor "Apple"		Macos Search vendor "Apple" for product "Macos"				>= 11.0.1 < 11.4 Search vendor "Apple" for product "Macos" and version " >= 11.0.1 < 11.4"		-		Affected
Apple Search vendor "Apple"		Tvos Search vendor "Apple" for product "Tvos"				< 14.6 Search vendor "Apple" for product "Tvos" and version " < 14.6"		-		Affected
Apple Search vendor "Apple"		Watchos Search vendor "Apple" for product "Watchos"				< 7.5 Search vendor "Apple" for product "Watchos" and version " < 7.5"		-		Affected