index.php in PHP Site Lock 2.0 allows remote attackers to bypass authentication and obtain administrative access by setting the login_id, group_id, login_name, user_id, and user_type cookies to certain values.

References

• https://nvd.nist.gov/vuln/detail/CVE-2009-1587
• https://exchange.xforce.ibmcloud.com/vulnerabilities/50304
• https://www.exploit-db.com/exploits/8604
• http://osvdb.org/54203
• http://secunia.com/advisories/34995
• http://www.vupen.com/english/advisories/2009/1249