Provide references for CVE-2013-4939.
Where can I find more information about CVE-2013-4939?
References are available at: https://moodle.org/mod/forum/discuss.php?d=232496, http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-39678, http://yuilibrary.com/support/20130515-vulnerability/, https://lists.apache.org/thread.html/d8b9403dbab85a51255614949938b619bd03b1c944c76c48c6996a0e%40%3Cdev.zookeeper.apache.org%3E, https://lists.apache.org/thread.html/72837f969cdf9b63a7e7337edd069fa3b3950eea7c997cc2ff61aa0c%40%3Cissues.zookeeper.apache.org%3E.