A vulnerability has been discovered in appRain CMF version 4.0.5, consisting of a stored authenticated XSS due to a lack of proper validation of user input, through the 'data[sconfig][admin_landing_page]', 'data[sconfig][currency]', 'data[sconfig][db_version]', 'data[sconfig][default_pagination]', 'data[sconfig][emailsetup_from_email]', 'data[sconfig][emailsetup_host]', 'data[sconfig][emailsetup_password]', 'data[sconfig][emailsetup_port]', 'data[sconfig][emailsetup_username]', 'data[sconfig][fileresource_id]', 'data[sconfig][large_image_height]', 'data[sconfig][large_image_width]' and 'data[sconfig][time_zone_padding]' parameters in /apprain/admin/config/opts.
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