# CVE-2026-120840: ThemeGrill User Registration missing authorization

Source: https://junglewise.ai/threats/cve-2026-120840-missing-authorization-vulnerability-in-themegrill-user  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-07. Updated: 2026-11-07  
License: CC BY 4.0 with a link back

CVE-2026-120840 · Severity: medium · CVSS 4.3 · Published 2026-11-07

ThemeGrill User Registration is a WordPress plugin that manages user account creation and registration on websites. A missing authorization flaw allows authenticated subscribers to access pages or perform actions they should not be permitted to, potentially exposing sensitive data or functionality to unauthorized users.

Technologies: [ThemeGrill User Registration](https://junglewise.ai/threats/technologies/themegrill-user-registration). Vendors: [ThemeGrill](https://junglewise.ai/threats/vendors/themegrill).

## Quick answers

**Is CVE-2026-120840 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-120840 being exploited in the wild.

**How severe is CVE-2026-120840?** Medium severity, with a CVSS score of 4.3, published 7 November 2026.

**Which products and versions are affected?** ThemeGrill User Registration through 5.3.0.

**Is there a fix for CVE-2026-120840?** Yes: fixed in 5.3.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-120840 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-120840?** Check whether you run ThemeGrill User Registration at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 5.3.1

## Technical details

The plugin fails to properly enforce access controls on certain pages or actions, allowing authenticated users with subscriber-level privileges to perform operations beyond their intended permission scope. The vulnerability affects plugin versions through 5.3.0 and requires the attacker to be authenticated as a subscriber-level user. A fix is available in version 5.3.1.

## Affected products

- ThemeGrill User Registration through 5.3.0

## Timeline

- 2026-10-30: disclosed
- 2026-11-07: advisory

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/user-registration/vulnerability/wordpress-user-registration-plugin-5-3-0-broken-access-control-vulnerability-2?_s_id=cve](https://patchstack.com/database/wordpress/plugin/user-registration/vulnerability/wordpress-user-registration-plugin-5-3-0-broken-access-control-vulnerability-2?_s_id=cve)

## Related threats

- [ThemeGrill User Registration broken access control](https://junglewise.ai/threats/cve-2026-124258-missing-authorization-vulnerability-in-themegrill-user)
- [ThemeGrill User Registration broken access control](https://junglewise.ai/threats/cve-2026-119522-missing-authorization-vulnerability-in-themegrill-user)
- [ThemeGrill User Registration Cross Site Scripting](https://junglewise.ai/threats/cve-2026-27061-subscriber-cross-site-scripting-xss-in-user-registration-5-3-0)
- [ThemeGrill User Registration broken access control](https://junglewise.ai/threats/cve-2026-25450-missing-authorization-vulnerability-in-themegrill-user)
- [ThemeGrill User Registration XSS in HTML tag neutralization](https://junglewise.ai/threats/cve-2026-25467-improper-neutralization-of-script-related-html-tags-in-a-web-page)