Upgrade to version 0.8.1 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.
Vendor URL: http://phptodo.godshell.com/
Vendor Specific News/Changelog Entry: http://phptodo.godshell.com/ChangeLog
Vendor Specific Advisory URL
FrSIRT Advisory: ADV-2007-1774