The Kide Shoutbox (com_kide) component 0.4.6 for Joomla! does not properly perform authentication, which allows remote attackers to post messages with an arbitrary account name via an insertar action to index.php. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
CWE-287 - Improper Authentication
Improper (or broken) authentication attacks are widespread, and have accounted for many of the worst data breaches in recent years. Improper authentication attacks are a class of vulnerabilities where an attacker impersonates a legitimate user by exploiting weaknesses in either session management or credential management to gain access to the user’s account. This can result in disclosure of sensitive information, and can lead to system compromise, theft, identity theft, and fraud.