Vulnerability identifier: #VU59662

Vulnerability risk: High

CVSSv3.1:

CVE-ID: CVE-2021-45085

CWE-ID:

Exploitation vector: Network

Exploit availability:

Vulnerable software:
GNOME Web (Epiphany)
Client/Desktop applications / Web browsers

Vendor: Gnome Development Team

Description

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

The vulnerability exists due to insufficient sanitization of user-supplied data when processing data passed via an "about: page" URL. A remote attacker can permanently store and execute arbitrary JavaScript code on the affected system, when the victim opens the Most Visited list tab (ephy-about:overview) in browser.

Mitigation
Install update from vendor's website.

Vulnerable software versions

GNOME Web (Epiphany): 41.0, 40.0 - 40.3

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Fixed software versions

CPE

• cpe:2.3:a:gnome:epiphany:41.0:*:*:*:*:*:*:*

External links
http://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/1045
http://gitlab.gnome.org/GNOME/epiphany/-/issues/1612
http://www.debian.org/security/2022/dsa-5042

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?