What is CVE-2026-120840?

CVE-2026-120840 is a medium-severity vulnerability in Themegrill User Registration, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-11-07.

How severe is CVE-2026-120840?

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

Auth bypass in Themegrill User Registration

CVE-2026-120840

Missing Authorization vulnerability in ThemeGrill User Registration user-registration allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects User Registration: from n/a through 5.3.0.

Vulnerability class: Broken Access Control

Published 2026-11-07 · last modified 2026-11-07.

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: 0.002 (14.5th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 14.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Themegrill User Registration

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

patchstack.com/database/wordpress/plugin/user-registration/vulnerability/wordpr… (vdb-entry)

Frequently asked questions

What is CVE-2026-120840?: CVE-2026-120840 is a medium-severity vulnerability in Themegrill User Registration, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-11-07.
How severe is CVE-2026-120840?: Medium severity. CVSS v3 base score is 4.3 out of 10.