system
Describe <CVE-2015-4557>.
user
What is <CVE-2015-4557>?
assistant
Cross-site scripting (XSS) vulnerability in the new_Twitter_sign_button function in nextend-Twitter-connect.php in the Nextend Twitter Connect plugin before 1.5.2 for WordPress allows remote attackers to inject arbitrary web script or HTML via the redirect_to parameter.  NOTE: this may overlap CVE-2015-4413..