# CVE-2026-25450: ThemeGrill User Registration broken access control

Source: https://junglewise.ai/threats/cve-2026-25450-missing-authorization-vulnerability-in-themegrill-user  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-29. Updated: 2026-10-29  
License: CC BY 4.0 with a link back

CVE-2026-25450 · Severity: medium · CVSS 5.3 · Published 2026-10-29

ThemeGrill User Registration is a WordPress plugin that manages user registration and profiles on websites. A broken access control vulnerability allows unauthenticated users to access pages or perform actions they should not be permitted to do, such as viewing other users' data. This could expose sensitive user information depending on what data the plugin stores.

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

## Quick answers

**Is CVE-2026-25450 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-25450 being exploited in the wild.

**How severe is CVE-2026-25450?** Medium severity, with a CVSS score of 5.3, published 29 October 2026.

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

**Is there a fix for CVE-2026-25450?** 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-2026-25450 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-25450?** 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 authorization checks, allowing unauthenticated attackers to bypass access controls and access protected functionality or data. The vulnerability requires no special privileges or user interaction. An attacker can view or interact with restricted content that should only be accessible to authorized users.

## Affected products

- ThemeGrill User Registration through 5.3.0

## Timeline

- 2026-10-29: disclosed

## 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?_s_id=cve](https://patchstack.com/database/wordpress/plugin/user-registration/vulnerability/wordpress-user-registration-plugin-5-3-0-broken-access-control-vulnerability?_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 missing authorization](https://junglewise.ai/threats/cve-2026-120840-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 XSS in HTML tag neutralization](https://junglewise.ai/threats/cve-2026-25467-improper-neutralization-of-script-related-html-tags-in-a-web-page)