Note: Requires PHP-Nuke 6.9 or newer
Changelog:
Fixed several vulnerabilities in modcp - Robert Lavierck
Changed whois lookup address within admin index
Fixed potential vulnerability in viewtopic postorder - 2.0.6d
Updates to cope with Zend Optimizer 2.5 problems - 2.0.6d - jetset
Force specialcharing of redirect variable in login - Pit
Fixed potential vulnerability in viewtopic postdays - GulfTech Security Research
Fixed potential vulnerability in viewforum topicdays - GulfTech Security Research
Fixed potential vulnerability in modcp
Fixed potential vulnerability in avatar gallery
Database upgrade instructions: Upload the included updatedb.php file to where mainfile.php is located and point your browser to it, once done delete the file.
Download here.

[Admin Note] As of 3/16/2004 This update pack has been applied to the phpnuke 7.1 distribution available here.