Contact Form 7 Captcha < 0.1.2 - Reflected Cross-Site Scripting

The plugin does not escape the $_SERVER['REQUEST_URI'] parameter before outputting it back in an attribute, which could lead to Reflected Cross-Site Scripting in old web browsers 

https://example.com/wp-admin/options-general.php?page=cf7sr_edit&"><script>alert(/XSS/)</script>