CVE-2008-6984: Parallels Plesk

Medium severity, CVSS 5.8. EPSS: 1.4% chance of exploitation in the next 30 days.

Plesk 8.6.0, when short mail login names (SHORTNAMES) are enabled, allows remote attackers to bypass authentication and send spam e-mail via a message with (1) a base64-encoded username that begins with a valid shortname, or (2) a username that matches a valid password, as demonstrated using (a) SMTP and qmail, and (b) Courier IMAP and POP3.

Affected products

• Parallels Plesk: version 8.6.0 only

Published 2009-08-19. Last modified 2026-06-16.