IBM WebSphere Portal 6.0 through 6.0.1.7, 6.1.0 through 6.1.0.6 CF27, 6.1.5 through 6.1.5.3 CF27, 7.0 through 7.0.0.2 CF25, and 8.0 through 8.0.0.1 CF08 allows remote attackers to read arbitrary files via a modified URL.