This indicates an attack attempt to exploit an SQL-injection vulnerability in VEGO Web Forum.
The vulnerability is a result of the application's failure to properly sanitize user input before using it in a SQL query. As a result, a remote attacker can send a crafted query to execute SQL commands on a vulnerable server.
VEGO Web Forum 1.26 and the prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are not aware of any officially supplied patch for this issue.