04WebServer contains a flaw that may allow a malicious user to inject arbitrary characters into the log file. The issue is triggered when an attacker submits a specially crafted URL. It is possible that the flaw may allow the injection of false entries into the log file resulting in a loss of integrity.
Upgrade to version 1.50 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.