Universal cross-site scripting in WebKitGTK+ and WPE WebKit



Published: 2021-03-26 | Updated: 2021-10-12
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-1879
CWE-ID CWE-79
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
Subscribe 		WebKitGTK+
Server applications / Frameworks for developing and running applications

WPE WebKit
Server applications / Frameworks for developing and running applications

Vendor WebKitGTK
WPE WebKit

Security Bulletin

This security bulletin contains information about 1 vulnerabilities.

Updated 29.03.2021

Added fixed version.

1) Universal cross-site scripting

EUVDB-ID: #VU51747

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-1879

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

Exploit availability: Yes

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within the WebKit engine. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of arbitrary website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.0.0 - 2.31.91

WPE WebKit: 2.19.93 - 2.31.91

CPE2.3 External links

http://support.apple.com/en-us/HT212256
http://support.apple.com/en-us/HT212257

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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