It was discovered that roundcube, a skinnable AJAX based webmail solution for IMAP servers, did not properly sanitize incoming mail messages. This would allow a remote attacker to perform a Cross-Side Scripting (XSS) attack.

For the stable distribution (buster), this problem has been fixed in version 1.3.14+dfsg.1-1~deb10u1.

We recommend that you upgrade your roundcube packages.

For the detailed security status of roundcube please refer to its security tracker page at: \ https://security-tracker.debian.org/tracker/roundcube