Joomla : Security Vulnerabilities, CVEs, Published In November 2009

Joomla! before 1.5.15 allows remote attackers to read an extension's XML file, and thereby obtain the extension's version number, via a direct request.

Unspecified vulnerability in the Front-End Editor in the com_content component in Joomla! before 1.5.15 allows remote authenticated users, with Author privileges, to replace the articles of an arbitrary user via unknown vectors.