---
id: "CVE-2026-120840"
page: "https://infrastack.ai/live/CVE-2026-120840"
kind: "vulnerability"
aliases: ["CVE-2026-120840"]
title: "User Registration WordPress plugin: missing authorization check exposes access controls"
severity: "medium"
cvss: 4.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "themegrill", "user-registration", "wordpress"]
not_affected_if: ["plugin-not-installed"]
published_at: "2026-11-07T10:17:10+00:00"
first_seen_at: "2026-11-07T10:46:41+00:00"
updated_at: "2026-11-07T10:48:54+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120840", "first_seen_at": "2026-11-07T10:46:41+00:00"}]
exploit_sources: []
---

# User Registration WordPress plugin: missing authorization check exposes access controls

Link for people: https://infrastack.ai/live/CVE-2026-120840 (this .md is for agents)

The ThemeGrill User Registration plugin for WordPress has a missing authorization check, so access control settings can be misused. The sources say an attacker can exploit incorrectly configured access control levels in versions through 5.3.0.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed User Registration plugin version in the WordPress admin plugin list, or with `wp plugin get user-registration --field=version` if WP-CLI is available.
- Compare against the version range in the sources: affected through `5.3.0`.

## Timeline

- 2026-11-07T10:46:41+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-120840

## From the sources

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.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_