Webchess Security Vulnerabilities - CVSS Score 9 - 10

CVE-2019-20896

WebChess 1.0 allows SQL injection via the messageFrom, gameID, opponent, messageID, or to parameter.

CVE-2023-39851

webchess v1.0 was discovered to contain a SQL injection vulnerability via the $playerID parameter at mainmenu.php. NOTE: this is disputed by a third party who indicates that the playerID is a session variable controlled by the server, and thus cannot be used for exploitation.