Fixes land on main and ship in the next 4.x release.

Please do not report security issues in public issues, pull requests or discussions.

Report them privately through GitHub: open the repository's Security tab and choose Report a vulnerability (https://github.com/jquery-form/form/security/advisories/new).

Include the plugin and jQuery versions, the options used, and a minimal reproduction. Reporters are credited in the advisory unless they ask not to be.