Click to Chat < 4.23 - Contributor+ Stored XSS via data-no_number Parameter

Description

The plugin is vulnerable to Stored Cross-Site Scripting via the ‘data-no_number’ parameter to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.