The web portal interface in Citrix Access Gateway (aka Citrix Advanced Access Control) before Advanced Edition 4.5 HF1 places a session ID in the URL, which allows context-dependent attackers to hijack sessions by reading "residual information", including the a referer log, browser history, or browser cache.
                
                    Exploit prediction scoring system (EPSS) score
                    
                        
                            EPSS Score 0.011
                        
                    
                    
                        
                            EPSS Ranking 77.4%