WPForms vulnerabilities

The WPForms plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'attacker-chosen key referenced by the smart tag' parameter in all versions up to and including 2.0.2.1 due to insufficient input sanitization and output escaping.

The WPForms plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'page_title' POST parameter and {page_title} Smart Tag in all versions up to and including 2.0.2 due to insufficient input sanitization and output escaping. It is only exploitable on forms whose confirmation message places the {page_title} Smart Tag inside an HTML attribute context.

WPForms plugin for WordPress up to 2.0.0.1 has a Stored XSS vulnerability via the data-sitekey attribute of OptinMonster integration. Authenticated attackers with contributor-level access can inject scripts that execute on page view.

The WPForms plugin for WordPress up to version 1.10.2 is vulnerable to CRLF Injection, allowing email header injection. The flaw occurs due to improper handling of the Reply-To display name, enabling unauthenticated attackers to inject arbitrary headers like Bcc into outgoing notification emails.

In WPForms versions <= 1.10.0.4, there is an issue with unauthenticated access to the contact form, leading to broken access control.

The WPForms WordPress plugin before version 1.10.0.5 does not verify the authenticity of incoming PayPal webhook events before processing them, allowing unauthenticated attackers to forge webhook payloads and manipulate the payment state of arbitrary transactions.

The WPForms plugin for WordPress up to version 1.10.0.1 does not properly verify the authenticity of PayPal Commerce webhooks. Unauthenticated attackers can forge webhook events and modify payment records, e.g., reactivate a cancelled subscription.