It indicates a possible exploit of Remote Code Execution Vulnerability in phpBB bulletin board package.
phpBB is a high powered, fully scalable, and highly customizable
Open Source bulletin board package. A remote code injection vulnerability is reported in it that may allow an attacker to execute arbitrary code on the vulnerable system with web server permission. This is due to application failure to properly sanitize highlight parameter passed to preg_replace() function in viewtopic.php. An attacker may exploit this by sending specially crafted URI to victims machine to include remote php code and execute it on the vulnerable system.
phpBB 2.0.15 and prior versions.
Compromise of the affected system.
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