#VU51747 Universal cross-site scripting


Published: 2021-10-12

Vulnerability identifier: #VU51747

Vulnerability risk: High

CVSSv3.1:

CVE-ID: CVE-2021-1879

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
WebKitGTK+
Server applications / Frameworks for developing and running applications
WPE WebKit
Server applications / Frameworks for developing and running applications

Vendor: WebKitGTK
WPE WebKit

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


CPE

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?


Latest bulletins with this vulnerability