The Gutena Forms WordPress plugin before 1.6.1 does not validate option to be updated, which could allow contributors and above role to update arbitrary boolean and array options (such as users_can_register).
Add your gear to cvedb and we'll alert you only when a vendor you run ships something exploited.
Check my exposure →This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.