Summary
The remote host is missing an update as announced
via advisory SSA:2008-089-02.
Solution
https://secure1.securityspace.com/smysecure/catid.html?in=SSA:2008-089-02
Insight
New seamonkey packages are available for Slackware 11.0, 12.0, and -current to fix security issues.
For more information, see:
http://www.mozilla.org/projects/security/known-vulnerabilities.html#seamonkey