Name of the Vulnerable Software and Affected Versions: Zend Framework versions (affected versions not specified)

Description: The issue concerns a potential XSS vulnerability in the Zend Service ReCaptcha MailHide component. It was possible for a malicious user to inject a specially crafted multibyte string as an attack via the CAPTCHA's email argument, due to the lack of validation of the email address and the incorrect use of htmlentities().

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.