An XSS vulnerability exists in framework/views/errorHandler/exception.php in Yii Framework 2.0.12 affecting the exception screen when debug mode is enabled, because $exception->errorInfo is mishandled.Referenceshttps://github.com/yiisoft/yii2/pull/14492https://github.com/yiisoft/yii2/pull/14492/files/feb4067de8a58f391a66e395192b0d83a8109b95