Insufficient Session Expiration vulnerability in Progress Software Corporation Sitefinity under some specific and uncommon circumstances allows reusing Session IDs (Session Replay Attacks).This issue affects Sitefinity: from 14.0 through 14.3, from 14.4 before 14.4.8145, from 15.0 before 15.0.8231, from 15.1 before 15.1.8332, from 15.2 before 15.2.8429.
According to WASC, “Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.”