Best Practical Solutions RT 3.6.0 through 3.6.10 and 3.8.0 through 3.8.8 allows remote attackers to trick users into sending credentials to an arbitrary server via unspecified vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/66794
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