@lex Guestbook Index.PHP Multiple Input Validation Vulnerabilities

@lex Guestbook is prone to multiple input-validation vulnerabilities because the application fails to properly sanitize user-supplied input.

An attacker may leverage these issues to have arbitrary script code execute in the browser of an unsuspecting user and to retrieve sensitive information. This may help the attacker steal cookie-based authentication credentials and launch other attacks.

Version 4.0.1 is vulnerable to these issues.


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