CVE-2020-8035 : What You Need to Know

Horde Groupware Webmail Edition before 5.2.22 is vulnerable to a stored Cross-Site Scripting (XSS) attack through SVG image uploads.

Understanding CVE-2020-8035

This CVE involves a security vulnerability in Horde Groupware Webmail Edition that could allow an attacker to execute a stored XSS attack.

What is CVE-2020-8035?

The vulnerability in Horde Groupware Webmail Edition before version 5.2.22 enables a stored Cross-Site Scripting (XSS) attack via an SVG image upload containing malicious JavaScript code. This could lead to unauthorized access to a victim's webmail account by tricking them into visiting a malicious URL.

The Impact of CVE-2020-8035

The exploitation of this vulnerability could result in unauthorized access to sensitive information stored in the victim's webmail account. Attackers could potentially compromise user data and perform malicious actions on behalf of the victim.

Technical Details of CVE-2020-8035

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

Vulnerability Description

The vulnerability arises from inadequate validation of SVG image uploads in Horde Groupware Webmail Edition, allowing attackers to embed malicious scripts that execute when a victim views the image.

Affected Systems and Versions

Product: Horde Groupware Webmail Edition
Versions affected: Before 5.2.22

Exploitation Mechanism

Attackers can exploit this vulnerability by uploading an SVG image containing JavaScript code to the webmail application. When a victim views the image, the malicious script executes, leading to a stored XSS attack.

Mitigation and Prevention

Protecting systems from CVE-2020-8035 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update Horde Groupware Webmail Edition to version 5.2.22 or later to mitigate the vulnerability.
Educate users about the risks of clicking on links from untrusted sources to prevent XSS attacks.

Long-Term Security Practices

Implement content security policies (CSP) to restrict the execution of scripts from unauthorized sources.
Regularly monitor and audit web application uploads for malicious content to prevent similar vulnerabilities.

Patching and Updates

Apply security patches and updates provided by Horde Groupware to address known vulnerabilities and enhance overall system security.