HTB22841: SQL Injection in Comment Rating wordpress plugin

Vulnerability ID: HTB22841
Reference: http://www.htbridge.ch/advisory/sql_injection_in_comment_rating_wordpress_plugin.html
Product: Comment Rating wordpress plugin
Vendor: Bob King ( http://wealthynetizen.com/ )
Vulnerable Version: 2.9.23
Vendor Notification: 08 February 2011
Vulnerability Type: SQL Injection
Status: Fixed by Vendor
Risk level: High
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/)

Vulnerability Details:
The vulnerability exists due to failure in the "/wp-content/plugins/comment-rating/ck-processkarma.php" script to properly sanitize user-supplied input in "id" variable.
Attacker can alter queries to the application SQL database, execute arbitrary queries to the database, compromise the application, access or modify sensitive data, or exploit various vulnerabilities in the underlying SQL database.

The following PoC is available:

http://[host]/wp-content/plugins/comment-rating/ck-processkarma.php?path=1&action=1&id=1%20and%201=2%20–%20

Solution: Upgrade to the most recent version