Exploit.WebBasedJavaCommandExecution is Malwarebytes’ detection name for web-based Java programs issuing system commands.
Exploit.WebBasedJavaCommandExecution protects against web-based Java programs that issue system commands. Many Java applications have vulnerabilities. This technique is designed to prevent these vulnerabilities from being exploited against you as a website visitor or web application user.
Malwarebytes protects your system(s) against web-based Java programs that issue system commands and displays the message Web-Based Java command execution detected