Soon after 1.5.19 a new joomla patch was brought out a few days later version 1.5.20; due to the short timespan between, some may have missed this update.
The Joomla Project announces the immediate availability of Joomla 1.5.20 [senu takaa]. This is a security release that addresses issues with the Joomla 1.5.19 packages. We recommend users upgrade immediately.
Link to joomla site.
