This indicates an attack attempt against a remote Script Execution vulnerability in Adobe Indesign Server.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application when parsing HTTP requests. A remote attacker may be able to exploit this to execute arbitrary script code within the context of the application via a crafted HTTP request.
Adobe InDesign CS6 8.x
Adobe InDesign Server CS5 7.x
System Compromise: Remote attackers can execute arbitrary script code on vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue.