CVE-2021-45085 : What You Need to Know

XSS vulnerability in GNOME Web (Epiphany) allows attackers to execute malicious scripts on user machines.

Understanding CVE-2021-45085

What is CVE-2021-45085?

CVE-2021-45085 is an XSS vulnerability in GNOME Web (Epiphany) versions before 40.4 and 41.x before 41.1. Attackers can exploit this by directing users to a compromised page.

The Impact of CVE-2021-45085

This vulnerability allows attackers to execute arbitrary scripts on a victim's browser, leading to various malicious activities like data theft, session hijacking, or unauthorized actions.

Technical Details of CVE-2021-45085

Vulnerability Description

The vulnerability arises in GNOME Web (Epiphany) through an about: page, demonstrated by a specific payload added to the Most Visited list through ephy-about:overview.

Affected Systems and Versions

Versions of GNOME Web (Epiphany) before 40.4 and 41.x before 41.1.

Exploitation Mechanism

Attackers prompt users to visit a crafted page that introduces an XSS payload leading to script execution on the victim's browser.

Mitigation and Prevention

Immediate Steps to Take

Update GNOME Web (Epiphany) to version 40.4 or 41.1 to patch the vulnerability.
Avoid visiting unfamiliar or suspicious websites that may contain malicious payloads.

Long-Term Security Practices

Regularly update software and applications to protect against known vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates to prevent exploitation of known vulnerabilities.