Roundcube Webmail Project Roundcube Webmail permission and access control issues vulnerability

The Roundcube Webmail project contains a permission and access control vulnerability in versions prior to 1.6.20 and 1.7.5 of version 1.7.x. This vulnerability stems from CSS scope bypass in HTML messages. The rcubeutils::modcssstyles function fails to treat the “at-rule” prefix as a selector...