CVE-2020-13653 : Security Advisory and Response

An XSS vulnerability exists in the Webmail component of Zimbra Collaboration Suite before 8.8.15 Patch 11, allowing attackers to inject executable JavaScript into a user's profile account name.

Understanding CVE-2020-13653

This CVE identifies a cross-site scripting (XSS) vulnerability in Zimbra Collaboration Suite.

What is CVE-2020-13653?

CVE-2020-13653 is an XSS vulnerability in Zimbra Collaboration Suite that enables malicious actors to insert executable JavaScript code into a user's profile account name. The injected code can execute when modifying an email signature.

The Impact of CVE-2020-13653

This vulnerability can lead to various security risks, including unauthorized access to user accounts, data theft, and potential manipulation of user settings and emails.

Technical Details of CVE-2020-13653

This section provides more in-depth technical information about the vulnerability.

Vulnerability Description

The XSS flaw in Zimbra Collaboration Suite allows attackers to insert JavaScript code into a user's account name, which can be executed when changing an email signature.

Affected Systems and Versions

Zimbra Collaboration Suite versions before 8.8.15 Patch 11 are vulnerable to this XSS exploit.

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious JavaScript code into a user's profile account name, which is then executed when the user updates their email signature.

Mitigation and Prevention

Protecting systems from CVE-2020-13653 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply the latest patch (8.8.15 Patch 11) provided by Zimbra to mitigate the vulnerability.
Educate users about the risks of clicking on suspicious links or emails to prevent XSS attacks.

Long-Term Security Practices

Regularly update Zimbra Collaboration Suite to ensure all security patches are applied promptly.
Implement content security policies (CSP) to mitigate the impact of XSS attacks.

Patching and Updates

Ensure that all systems running Zimbra Collaboration Suite are updated to version 8.8.15 Patch 11 or later to address the XSS vulnerability.