CVE-2021-24002

Name of the Vulnerable Software and Affected Versions: Firefox versions prior to 88 Firefox ESR versions prior to 78.10 Thunderbird versions prior to 78.10

Description: The issue is related to errors in handling newline characters in FTP URLs, such as %0A or %0D. This can allow a remote attacker to send arbitrary commands to an FTP server. When a user clicks on an FTP URL containing encoded newline characters, the newlines are interpreted, enabling the sending of arbitrary commands to the FTP server.

Recommendations: For Firefox versions prior to 88, update to version 88 or later. For Firefox ESR versions prior to 78.10, update to version 78.10 or later. For Thunderbird versions prior to 78.10, update to version 78.10 or later.