salavat counter Plugin <= 0.9.5 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'image_url' Parameter

The salavat counter Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'image_url' parameter in all versions up to, and including, 0.9.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.