Provide references for CVE-2011-2891.
Where can I find more information about CVE-2011-2891?
References are available at: https://exchange.xforce.ibmcloud.com/vulnerabilities/68881, http://bl0g.yehg.net/2011/04/joomla-161-and-lower-information.html, http://www.openwall.com/lists/oss-security/2011/06/27/8, http://www.openwall.com/lists/oss-security/2011/06/27/6, http://developer.joomla.org/security/news/341-20110402-core-information-disclosure.html.