Secunia Security Advisory – Ahmad Maulana has discovered a vulnerability in the com_hashcash component for Joomla, which can be exploited by malicious people to compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/48263/sa21053.txt
Source: https://packetstormsecurity.com/files/48263/Secunia-Security-Advisory-21053.html