Grav Form Plugin vulnerabilities

Grav Form Plugin before 9.1.19 fails to escape field-definition properties including prepend, append, spacer text, section text, and select option labels in form templates. Attackers with form authoring privileges can inject arbitrary HTML and JavaScript that executes for all form visitors through unescaped |raw filters and unquoted attributes.

The Grav form plugin (getgrav/grav-plugin-form) before version 9.1.13 contains an open redirect vulnerability. Since v9.1.11, the redirect process action evaluates user-supplied form data inside Twig expressions, and Grav::redirect() accepts external URLs without origin validation. An unauthenticated user can supply a malicious URL, causing a 302 redirect to an arbitrary external site.

Grav Form plugin before version 9.1.15 contains a stored cross-site scripting vulnerability in radio and toggle field option labels rendered with the Twig |raw filter. Attackers with form authoring permissions can inject HTML and script payloads in option labels that execute in the browsers of visitors and administrators viewing the form.