Best Practical Solutions RT before 3.8.9 does not perform certain redirect actions upon a login, which allows physically proximate attackers to obtain credentials by resubmitting the login form via the back button of a web browser on an unattended workstation after an RT logout.
https://github.com/bestpractical/rt/commit/917c211820590950f7eb0521f7f43b31aeed44c4
https://github.com/bestpractical/rt/commit/057552287159e801535e59b8fbd5bd98d1322069
https://exchange.xforce.ibmcloud.com/vulnerabilities/65771
http://www.vupen.com/english/advisories/2011/0475
http://secunia.com/advisories/43438
http://openwall.com/lists/oss-security/2011/02/24/9
http://openwall.com/lists/oss-security/2011/02/24/8
http://openwall.com/lists/oss-security/2011/02/24/7
http://openwall.com/lists/oss-security/2011/02/23/22
http://openwall.com/lists/oss-security/2011/02/22/6
http://openwall.com/lists/oss-security/2011/02/22/16
http://openwall.com/lists/oss-security/2011/02/22/12
http://lists.bestpractical.com/pipermail/rt-announce/2011-February/000186.html
http://issues.bestpractical.com/Ticket/Display.html?id=15804