Description
Joomla! Core is prone to a spam vulnerability. Exploiting this issue may allow attackers to send spam through the affected website. Joomla! Core versions 1.5.x ranging from 1.5.0 and up to and including 1.5.22 are vulnerable.
Remediation
Update to Joomla! Core version 1.5.23 or latest
References
https://developer.joomla.org/joomlacode-archive/issue-24289.html
https://www.exploit-db.com/exploits/15979/
https://www.joomla.org/announcements/release-news/5367-joomla-1523-released.html
Related Vulnerabilities
WordPress Plugin Online Lesson Booking Multiple Vulnerabilities (0.8.6)
WordPress Plugin Import any XML or CSV File to WordPress Cross-Site Scripting (3.6.2)
WordPress 2.6.3 Cross-Site Scripting Vulnerability (0.6.2 - 2.6.3)
WordPress Plugin Responsive Filterable Portfolio Unspecified Vulnerability (1.0.8)
WordPress Plugin Duplicate Post Multiple Vulnerabilities (2.5)