CVE-2020-15562 : Vulnerability Insights and Analysis

An issue was discovered in Roundcube Webmail before 1.2.11, 1.3.x before 1.3.14, and 1.4.x before 1.4.7, allowing XSS via a crafted HTML e-mail message.

Understanding CVE-2020-15562

This CVE identifies a cross-site scripting (XSS) vulnerability in Roundcube Webmail versions prior to 1.2.11, 1.3.14, and 1.4.7.

What is CVE-2020-15562?

The vulnerability allows XSS attacks through a specially crafted HTML email, leveraging a JavaScript payload in the xmlns attribute of a HEAD element when an SVG element is present.

The Impact of CVE-2020-15562

Exploitation of this vulnerability could lead to unauthorized access to sensitive information, session hijacking, and potential compromise of user accounts.

Technical Details of CVE-2020-15562

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability in Roundcube Webmail versions before 1.2.11, 1.3.14, and 1.4.7 enables XSS attacks via manipulated HTML email content.

Affected Systems and Versions

Roundcube Webmail versions before 1.2.11
Roundcube Webmail versions before 1.3.14
Roundcube Webmail versions before 1.4.7

Exploitation Mechanism

Attackers can exploit this vulnerability by inserting a JavaScript payload in the xmlns attribute of a HEAD element when an SVG element is present in a crafted HTML email.

Mitigation and Prevention

Protecting systems from CVE-2020-15562 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update Roundcube Webmail to version 1.2.11, 1.3.14, or 1.4.7 to mitigate the vulnerability.
Educate users about the risks of opening emails from unknown or untrusted sources.

Long-Term Security Practices

Implement content security policies (CSP) to prevent XSS attacks.
Regularly monitor and audit email content for suspicious elements.

Patching and Updates

Apply security patches provided by Roundcube Webmail promptly to address known vulnerabilities.