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Name of the Vulnerable Software and Affected Versions: WebCalendar versions 1.0.4 and earlier Description: A cross-site scripting issue exists, allowing remote attackers to inject arbitrary web script or HTML. This is achieved via the `format` parameter in the export handler.php file. Recommendations: For WebCalendar versions 1.0.4 and earlier, consider restricting access to the export handler.php file until a fix is available. As a temporary workaround, avoid using the `format` parameter in the affected endpoint.