A vulnerability, which was classified as problematic, has been found in EFS Easy Chat Server 3.1. Affected by this issue is some unknown functionality of the component HTTP GET Request Handler. The manipulation of the argument USERNAME leads to denial of service. 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-251480. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
https://www.youtube.com/watch?v=nGyS2Rp5aEo
https://www.exploitalert.com/view-details.html?id=40072
https://vuldb.com/?ctiid.251480
https://packetstormsecurity.com/files/176381/Easy-Chat-Server-3.1-Denial-Of-Service.html