Auth bypass in Invisible Anti-Spam & Captcha — Recaptcha Alternative For All Forms

CVE-2026-91010

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.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (17.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-91010: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • Invisible Anti-Spam & Captcha — Recaptcha Alternative For All Forms

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-91010?
CVE-2026-91010 is a medium-severity vulnerability in Invisible Anti-Spam & Captcha — Recaptcha Alternative For All Forms, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-09-17.
How severe is CVE-2026-91010?
Medium severity. CVSS v3 base score is 4.3 out of 10.