Best Practical Solutions RT 3.0.0 through 3.6.10, 3.8.0 through 3.8.9, and 4.0.0rc through 4.0.0rc7 allows remote authenticated users to obtain sensitive information by using the search interface, as demonstrated by retrieving encrypted passwords.
https://exchange.xforce.ibmcloud.com/vulnerabilities/66793
https://bugzilla.redhat.com/show_bug.cgi?id=696795
http://www.vupen.com/english/advisories/2011/1071
http://www.securityfocus.com/bid/47383
http://www.debian.org/security/2011/dsa-2220
http://secunia.com/advisories/44189
http://lists.bestpractical.com/pipermail/rt-announce/2011-April/000189.html
http://lists.bestpractical.com/pipermail/rt-announce/2011-April/000188.html
http://lists.bestpractical.com/pipermail/rt-announce/2011-April/000187.html
http://blog.bestpractical.com/2011/04/security-vulnerabilities-in-rt.html