Author Avatars List/Block < 2.1.22 - Authenticated (Subscriber+) Stored Cross-Site Scripting

Description

The Author Avatars List/Block plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.1.21 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.