Piwik before 1.1 does not prevent the rendering of the login form inside a frame in a third-party HTML document, which makes it easier for remote attackers to conduct clickjacking attacks via a crafted web site.

References

• https://nvd.nist.gov/vuln/detail/CVE-2011-0399
• https://exchange.xforce.ibmcloud.com/vulnerabilities/64640
• http://dev.piwik.org/trac/ticket/1679
• http://osvdb.org/70383
• http://piwik.org/blog/2011/01/piwik-1-1-2/
• http://www.securityfocus.com/bid/45787