The A-Form and A-Form bamboo before 1.3.6 and 2.x before 2.0.3, and A-Form PC and PC/Mobile before 3.1, plug-ins for Movable Type do not require administrative authentication, which allows remote authenticated users to modify data via unspecified vectors.
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.