Multi Uploader for Gravity Forms Plugin Vulnerable to Unauthorized Media Deletion
The Multi Uploader for Gravity Forms plugin for WordPress reportedly contains a critical vulnerability that could allow unauthorized deletion of media files. Users of versions up to and including 1.1.8 are potentially affected.
What happened
An early warning has been issued regarding a critical vulnerability in the Multi Uploader for Gravity Forms plugin for WordPress. The vulnerability, tracked as CVE-2026-5581 with a CVSS score of 9.1, affects all versions up to and including 1.1.8. This issue arises from missing capability checks in the `plupload_ajax_delete_file()` function, registered via `wp_ajax_nopriv_gfmu_delete_file`.
The vulnerability allows unauthorized arbitrary media deletion. The nonce intended for CSRF protection is exposed on any public-facing page containing a multi-uploader form field via the `GFMU_options` JavaScript object. This exposure enables unauthenticated attackers to delete any WordPress media attachment by supplying its attachment ID, potentially leading to the complete destruction of the media library.
Professional software engineers assessing their exposure should consider upgrading to a version beyond 1.1.8 or applying a patch if available. For more detailed information, primary sources should be consulted.
How 0Day mitigates this
gravity forms multi uploader is anywhere in your dependency tree, the engineers who own the affected repositories get a push alert the moment it is flagged — no manual audit to remember to run.Read how this differs from waiting on a scanner to catch a known advisory, or see the exact, read-only access 0Day needs to do this for an organization.