IBM Leads 7.x, 8.1.0 before 8.1.0.14, 8.2, 8.5.0 before 8.5.0.7.3, 8.6.0 before 8.6.0.8.1, 9.0.0 through 9.0.0.4, 9.1.0 before 9.1.0.6.1, and 9.1.1 before 9.1.1.0.2 allows remote authenticated users to bypass intended file-upload restrictions via a modified extension.