SUBJECT: Mitigate Roundcube Webmail XSS Vulnerability (CVE-2023-43770)
TECH STACK: Roundcube webmail server software
DATE(S) ISSUED: 09/22/2023
NVD Last Modified: 02/12/2024
CRITICALITY: Medium (CVSS Score: 6.1)
OVERVIEW:
This document outlines mitigation steps to address a vulnerability (CVE-2023-43770) in Roundcube webmail versions before 1.4.14, 1.5.x before 1.5.4, and 1.6.x before 1.6.3. This vulnerability allows attackers to inject malicious scripts into web pages viewed by users, potentially leading to information disclosure, account takeover, or other malicious activities.
MITIGATION INSTRUCTIONS:
Upgrade Roundcube:
This is the recommended and most effective mitigation.
Upgrade your Roundcube installation to version 1.4.14, 1.5.4, or 1.6.3 (or later) as soon as possible. These versions address the vulnerability. Refer to the Roundcube documentation or community resources for upgrade instructions:
Apply Temporary Mitigations (if immediate upgrade not possible):
If immediate upgrade is not feasible, consider these temporary mitigations:
- Disable HTML rendering in emails: This significantly reduces the risk associated with the vulnerability, but may affect user experience.
- Implement additional security measures: Consider implementing email filtering or content scanning solutions to help detect and block malicious emails.
Confirmation & Additional Information:
- Verify the Roundcube version: Check your Roundcube version through the web interface or server configuration.
- Monitor for updates: Subscribe to Roundcube security advisories to stay informed about future vulnerabilities and updates.
- Consider additional security measures: Implement email security best practices, such as user education on phishing attempts and email attachment handling.
Refer to the following resources for further information:
