IceWarp Utility Download cross site scripting

A vulnerability classified as problematic has been found in IceWarp 12.0.2.1/12.0.3.1. This affects an unknown part of the file /install/ of the component Utility Download Handler. The manipulation of the argument lang with the input 1%27"()%26%25<zzz><ScRiPt>alert(document.domain)</ScRiPt> leads to cross site scripting. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-249759. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.