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

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:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (19.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.2% 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-2026-16056: held from 0.003 to 0.003.

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

Affected products

  • Contest Gallery — versions 0

Weakness classification (CWE)

References

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.