Cross-site scripting (XSS) vulnerability in ar-blog 5.2 allows remote attackers to inject arbitrary web script or HTML via the (1) month or (2) year parameter to index.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24246
http://www.securityfocus.com/archive/1/435205/100/0/threaded
http://www.securityfocus.com/archive/1/422386/100/0/threaded