Invisible Anti-Spam lets subscribers permanently delete stored submissions
Invisible Anti-Spam & CAPTCHA from 2.0.5 up to but not including 5.1.1, any logged-in user, including a Subscriber, can invoke the message-deletion AJAX operation without a capability check. The handler checks only that a nonce parameter exists rather than validating its value. This permits permanent deletion of every stored form submission. The export does not name the action, nonce field or deletion selector.
- Component
- Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms
- Affected
- 2.0.5 to < 5.1.1
- Safe version
5.1.1- Published
- Sep 17, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Sep 17, 2026 and is one of 1 known issue for this plugin.
Update, patch or deactivate.
Update Invisible Anti-Spam & CAPTCHA to 5.1.1 or later. Require submission-management permission and validate the nonce before deletion; scope target records to the caller's authority. Investigate unexpected submission loss and restore from backups where 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 Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms WordPress plugin before 5.1.1 does not check the user's capabilities in its message deletion AJAX action, and only tests that a nonce parameter is present rather than validating it, allowing any authenticated user, such as a subscriber, to permanently delete every form submission the Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms WordPress plugin before 5.1.1 has stored.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N