RedTeam Pentesting discovered a cross site scripting vulnerability in the PHP markup parser Decoda. This allows attackers that should be restricted to the markup supported by Decoda to specify a JavaScript event handler for an iframe tag. Depending on the usage of Decoda, this allows attackers to execute JavaScript code in the context of other users in a web application that uses Decoda. php-decoda versions 3.x prior to 3.3.3 are affected.
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