CVE-2018-9846: Debian Linux
High severity, CVSS 8.8. EPSS: 2.3% chance of exploitation in the next 30 days.
In Roundcube from versions 1.2.0 to 1.3.5, with the archive plugin enabled and configured, it's possible to exploit the unsanitized, user-controlled "_uid" parameter (in an archive.php _task=mail&_mbox=INBOX&_action=plugin.move2archive request) to perform an MX (IMAP) injection attack by placing an IMAP command after a %0d%0a sequence. NOTE: this is less easily exploitable in 1.3.4 and later because of a Same Origin Policy protection mechanism.
Affected products
Published 2018-04-07. Last modified 2026-06-17.