Caucho Technology Resin 1.2 and possibly earlier allows remote attackers to view JSP source via an HTTP request to a .jsp file with certain characters appended to the file name, such as (1) "..", (2) "%2e..", (3) "%81", (4) "%82", and others.
https://exchange.xforce.ibmcloud.com/vulnerabilities/5568
http://www.securityfocus.com/bid/1986