CVE-2021-44025 : What You Need to Know

Roundcube before 1.3.17 and 1.4.x before 1.4.12 is prone to XSS in handling an attachment's filename extension when displaying a MIME type warning message.

Understanding CVE-2021-44025

Roundcube vulnerability leading to XSS due to mishandling attachment filename extensions.

What is CVE-2021-44025?

Roundcube versions before 1.3.17 and 1.4.12 are susceptible to cross-site scripting when processing attachment filename extensions.

The Impact of CVE-2021-44025

The vulnerability allows attackers to execute malicious scripts in the context of a user's browser, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2021-44025

Roundcube vulnerability specifics and impacts.

Vulnerability Description

The issue arises from improper handling of attachment file extensions, enabling an attacker to inject and execute malicious scripts.

Affected Systems and Versions

Versions before Roundcube 1.3.17 and 1.4.12

Exploitation Mechanism

By manipulating attachment filenames, attackers can inject malicious scripts, exploiting the XSS vulnerability.

Mitigation and Prevention

Steps to protect systems from CVE-2021-44025.

Immediate Steps to Take

Update Roundcube to versions 1.3.17 or 1.4.12 or newer to mitigate the XSS vulnerability.
Regularly monitor and review attachment handling mechanisms for suspicious activities.

Long-Term Security Practices

Implement content security policies to reduce the impact of XSS attacks.
Educate users on safe attachment handling practices to avoid falling victim to malicious scripts.
Conduct regular security assessments and audits to identify and address vulnerabilities.

Patching and Updates

Stay informed about security advisories and promptly apply patches released by Roundcube to address known vulnerabilities.