This indicates an attack attempt to exploit a Cross-Site Scripting Vulnerability in WWBN AVideo.
The vulnerability is due to improper input validation. A remote, authenticated attacker could exploit this vulnerability by sending a crafted request to the target server. Successful exploitation could result in execution of arbitrary script code in the security context of the victims browser.
WWBN AVideo prior to commit 3f7c0364
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.