A vulnerability was found in Muyun DedeBIZ up to 6.2.12 and classified as critical. Affected by this issue is some unknown functionality of the component Add Attachment Handler. The manipulation leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-249368. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.