What is CVE-2026-16056?

CVE-2026-16056 is a medium-severity vulnerability in Contest Gallery, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-08-04.

How severe is CVE-2026-16056?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Contest Gallery

CVE-2026-16056

The Contest Gallery WordPress plugin before 30.0.7 does not perform any capability or nonce check in one of its handlers, allowing any authenticated user down to Subscriber to read the site's entire stored OpenAI prompt history.

Vulnerability class: Broken Access Control

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:L/I:N/A:N.

Affected products

Unknown Contest Gallery — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-16056?: CVE-2026-16056 is a medium-severity vulnerability in Contest Gallery, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-08-04.
How severe is CVE-2026-16056?: Medium severity. CVSS v3 base score is 4.3 out of 10.