This indicates a possible attempt to exploit a SQL Injection vulnerability in
Andy's PHP Knowledgebase.
The vulnerability is due to errors in "a_viewusers.php". It may allow remote attackers to execute arbitrary SQL commands.
Andy's PHP Knowledgebase 0.95.2. Earlier versions may also be affected.
System Compromise: Execution of arbitrary SQL commands on the system.
Currently we are not aware of any official fix for this issue.