Advanced Contact Form 7 – Compact DB: A security weakness
Advanced Contact Form 7 – Compact DB is affected by a security weakness. The vulnerable path is reachable without authentication. The resulting impact depends on how the affected component exposes the vulnerable operation. The published affected range is <= 1.0.0.
- Component
- Advanced Contact Form 7 – Compact DB
- Plugin slug
advanced-contact-form-7-compact-db- Affected
- <= 1.0.0
- Safe version
> 1.0.0- Published
- Jun 24, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Jun 24, 2026 and is one of 1 known issue for this plugin.
Update, patch or deactivate.
Update Advanced Contact Form 7 – Compact DB to a release after 1.0.0, or disable and remove it until a fixed version is available.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The Advanced Contact Form 7 - Compact DB plugin for WordPress is vulnerable to unauthorized deletion of data due to a missing capability check on the cf7cdb_ajax_delete_user() function in versions up to, and including, 1.0.0. The handler is registered against both `wp_ajax_cf7cdb_delete` and `wp_ajax_nopriv_cf7cdb_delete`, and it performs no nonce verification, no capability check, and no ownership check before invoking `$wpdb->delete()` against the `wp_cf7cdb_data` table with an attacker-supplied integer ID. This makes it possible for unauthenticated attackers to delete arbitrary contact form submission entries stored by the plugin by iterating sequential primary-key IDs.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N