CVE-2017-9557: Echatserver Easy Chat Server

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

register.ghp in EFS Software Easy Chat Server versions 2.0 to 3.1 allows remote attackers to discover passwords by sending the username parameter in conjunction with an empty password parameter, and reading the HTML source code of the response.

Affected products

• Echatserver Easy Chat Server: from 2.0, up to and including 3.1

Published 2017-06-12. Last modified 2026-06-17.