CVE-2026-75107: Grav Form Plugin before 9.1.19 Stored XSS via Field Properties
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.
Affected Software
Event History
Frequently Asked Questions
What access does an attacker need to exploit this issue?
An attacker needs form authoring privileges to place malicious content in affected field-definition properties. Exploitation also requires a victim to visit a form that renders the attacker-controlled definition.
Who is affected by a successful exploit?
Form visitors are exposed when a form renders attacker-controlled values in properties such as prepend, append, spacer text, section text, or select option labels. The injected HTML or JavaScript can execute in those visitors' browsers.
What should be done if the plugin cannot be upgraded immediately?
Upgrade the Grav Form Plugin to version 9.1.19 or later. If upgrading is not immediately possible, restrict form authoring privileges to trusted users and review field-definition properties for unexpected HTML or JavaScript.