Executive brief
Fluent Forms is a popular WordPress plugin used to create and manage contact forms and customer submissions. A security flaw allows a user who has been granted permission to manage only specific forms to bypass these restrictions and delete submission data from other forms they are not authorized to access. This could lead to the permanent loss of customer inquiries or lead data if a restricted staff member or collaborator acts maliciously or their account is compromised.
Technical details
An Insecure Direct Object Reference (IDOR) vulnerability exists in the bulk-actions endpoint of the Fluent Forms REST API. The plugin fails to validate that the submission entry IDs provided in the 'entries[]' array actually belong to the 'form_id' specified in the request. An attacker with 'Manager' privileges (which can be assigned to users with roles as low as Subscriber) can provide a 'form_id' they are authorized to manage while supplying entry IDs from unauthorized forms. This bypasses the per-form access control check, allowing the permanent deletion of arbitrary form submissions via the 'other.delete_permanently' action. The issue is fixed in version 6.2.5.
Affected products
- WPManageNinja Fluent Forms before 6.2.5
Timeline
- 2026-06-11: disclosed
- 2026-06-11: patched: Fixed in version 6.2.5
- 2026-07-02: advisory