The vulnerability stems from improper URL parsing in redirect logic. Analysis focused on: 1) Entry points processing request parameters (like WebSSOResource handlers) 2) URL construction utilities used in redirect flows. While exact patch details are unavailable, the described vulnerability pattern strongly suggests these functions would be involved in processing untrusted redirect targets without proper validation in pre-1.6.1 versions. Confidence is medium due to inference from vulnerability description rather than direct patch analysis.