CVE-2009-2210: Mozilla Seamonkey

High severity, CVSS 9.3. EPSS: 3.8% chance of exploitation in the next 30 days.

Mozilla Thunderbird before 2.0.0.22 and SeaMonkey before 1.1.17 allow remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a multipart/alternative e-mail message containing a text/enhanced part that triggers access to an incorrect object type.

Affected products

• Mozilla Seamonkey: up to and including 1.1.16; version 1.0 only; version 1.0.1 only; version 1.0.2 only; version 1.0.3 only; version 1.0.4 only; …
• Mozilla Thunderbird: up to and including 2.0.0.21; version 0.1 only; version 0.2 only; version 0.3 only; version 0.4 only; version 0.5 only; …

Published 2009-06-25. Last modified 2026-06-16.