CVE-2021-30823

webkitgtk: Logic issue leading to HSTS bypass

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A logic issue was addressed with improved restrictions. This issue is fixed in macOS Monterey 12.0.1, iOS 14.8 and iPadOS 14.8, tvOS 15, Safari 15, watchOS 8. An attacker in a privileged network position may be able to bypass HSTS.

Se abordó un problema de lógica con restricciones mejoradas. Este problema se corrigió en macOS Monterey versión 12.0.1, iOS versión 14.8 y iPadOS versión 14.8, tvOS versión 15, Safari versión 15, watchOS versión 8. Un atacante en una posición de red privilegiada puede ser capaz de omitir HSTS

A logic issue was found in WebKitGTK. An attacker in a privileged network position could use this flaw to bypass HSTS.

An update that fixes 43 vulnerabilities is now available. This update for webkit2gtk3 fixes the following issues. Fixed logic issue allowing unexpectedly unenforced Content Security Policy when processing maliciously crafted web content. Fixed logic issue allowing universal cross site scripting when processing maliciously crafted web content.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

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
2021-10-27 CVE Published
2024-08-03 CVE Updated
2025-07-10 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (9)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2021/12/20/6	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://support.apple.com/en-us/HT212807	2023-01-09
https://support.apple.com/en-us/HT212815	2023-01-09
https://support.apple.com/en-us/HT212816	2023-01-09
https://support.apple.com/en-us/HT212819	2023-01-09
https://support.apple.com/en-us/HT212869	2023-01-09
https://support.apple.com/kb/HT212953	2023-01-09
https://access.redhat.com/security/cve/CVE-2021-30823	2025-07-07
https://bugzilla.redhat.com/show_bug.cgi?id=2034373	2025-07-07

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"				< 15.0.0 Search vendor "Apple" for product "Safari" and version " < 15.0.0"		-		Affected
Apple Search vendor "Apple"		Ipados Search vendor "Apple" for product "Ipados"				< 14.8 Search vendor "Apple" for product "Ipados" and version " < 14.8"		-		Affected
Apple Search vendor "Apple"		Iphone Os Search vendor "Apple" for product "Iphone Os"				< 14.8 Search vendor "Apple" for product "Iphone Os" and version " < 14.8"		-		Affected
Apple Search vendor "Apple"		Macos Search vendor "Apple" for product "Macos"				< 12.0.1 Search vendor "Apple" for product "Macos" and version " < 12.0.1"		-		Affected
Apple Search vendor "Apple"		Tvos Search vendor "Apple" for product "Tvos"				< 15.0 Search vendor "Apple" for product "Tvos" and version " < 15.0"		-		Affected
Apple Search vendor "Apple"		Watchos Search vendor "Apple" for product "Watchos"				< 8.0 Search vendor "Apple" for product "Watchos" and version " < 8.0"		-		Affected