CVE-2024-42010: Roundcube

High severity, CVSS 7.5. EPSS: 66.7% chance of exploitation in the next 30 days.

mod_css_styles in Roundcube through 1.5.7 and 1.6.x through 1.6.7 insufficiently filters Cascading Style Sheets (CSS) token sequences in rendered e-mail messages, allowing a remote attacker to obtain sensitive information.

Affected products

• Roundcube Roundcube: up to and including 1.5.7; from 1.6x, up to and including 1.6.7

Published 2024-08-05. Last modified 2026-06-17.