CVE-2004-2703: Clearswift Mailsweeper Business Suite I

Medium severity, CVSS 4.3. EPSS: 1.1% chance of exploitation in the next 30 days.

Clearswift MIMEsweeper 5.0.5, when it has been upgraded from MAILsweeper for SMTP version 4.3 or MAILsweeper Business Suite I or II, allows remote attackers to bypass scanning by including encrypted data in a mail message, which causes the message to be marked as "Clean" instead of "Encrypted".

Affected products

• Clearswift Mailsweeper Business Suite I: any version
• Clearswift Mailsweeper Business Suite Ii: any version
• Clearswift Mailsweeper For Smtp: version 4.3 only
• Clearswift Mimesweeper For Web: version 5.0.5 only

Published 2004-12-31. Last modified 2026-06-16.