Mega/**/and/**/cast(md5('1618057381')as/**/int)>0

The payload MEGA/**/and/**/cast(md5('1618057381')as/**/int)>0 is broken down as follows:

to ensure you are using prepared statements to prevent SQL injection. MEGA/**/and/**/cast(md5('1618057381')as/**/int)>0

, as it is almost certainly a bot attempt to test your site's security or place spam links. MEGA/**/and/**/cast(md5('1618057381')as/**/int)>0

What Is the MD5 Hashing Algorithm & How Does It Work? - Avast MEGA/**/and/**/cast(md5('1618057381')as/**/int)>0

cast(... as int) : Attempts to convert that hash (a hexadecimal string) into an integer.

: If the database successfully executes this and returns a result, the attacker knows the application is vulnerable to SQL injection. In many databases, casting a non-numeric MD5 string to an integer will trigger an error , which can leak information about the database type or version (Error-Based SQLi). Context of Use