CVE-2015-8770: Roundcube Webmail

High severity, CVSS 7.5. EPSS: 22.4% chance of exploitation in the next 30 days.

Directory traversal vulnerability in the set_skin function in program/include/rcmail_output_html.php in Roundcube before 1.0.8 and 1.1.x before 1.1.4 allows remote authenticated users with certain permissions to read arbitrary files or possibly execute arbitrary code via a .. (dot dot) in the _skin parameter to index.php.

Affected products

• Roundcube Roundcube Webmail: up to and including 1.0.7; version 1.1.0 only; version 1.1.1 only; version 1.1.2 only; version 1.1.3 only

Published 2016-01-29. Last modified 2026-06-17.