Roundcube · Roundcube · CVE-2021-26925
Name of the Vulnerable Software and Affected Versions:
Roundcube versions prior to 1.4.11
Description:
The issue allows for an XSS attack through crafted Cascading Style Sheets (CSS) token sequences during the rendering of HTML email. This can occur when an attacker sends a specially designed email that exploits this weakness.
Recommendations:
For versions prior to 1.4.11, update to version 1.4.11 or later to resolve the issue. As a temporary workaround, consider restricting the rendering of HTML emails or disabling the use of CSS in emails until a patch is applied. Avoid using potentially vulnerable CSS token sequences in email templates until the issue is resolved.