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Joomla! Multiple HTML Injection Vulnerabilities

Joomla! is prone to multiple HTML-injection vulnerabilities because it fails to sufficiently sanitize user-supplied data.

Attacker-supplied HTML or JavaScript code could run in the context of the affected site, potentially allowing the attacker to steal cookie-based authentication credentials and to control how the site is rendered to the user; other attacks are also possible.

These issues affect versions prior to Joomla! 1.5.8.