Joomla! Core is prone to a vulnerability that lets attackers upload arbitrary files because the application fails to properly verify user-supplied input. An attacker can exploit this vulnerability to upload arbitrary code and run it in the context of the webserver process. This may facilitate unauthorized access or privilege escalation; other attacks are also possible. Joomla! Core versions 1.5.x ranging from 1.5.0 and up to and including 1.5.15 are vulnerable.

References

• https://nvd.nist.gov/vuln/detail/CVE-2010-1433
• https://developer.joomla.org/security-centre/310-20100423-core-installer-migration-script.html
• https://www.acunetix.com/vulnerabilities/web/joomla-core-1-5-x-arbitrary-file-upload-1-5-0-1-5-15/