# CVE-2026-106597: ThemeGrill User Registration broken access control

Source: https://junglewise.ai/threats/cve-2026-106597-missing-authorization-vulnerability-in-themegrill-user  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-106597 · Severity: medium · CVSS 5.3 · Published 2026-10-13

ThemeGrill User Registration is a WordPress plugin that manages user signups and registration forms. A broken access control flaw allows unauthenticated attackers to access pages or perform actions they should not be permitted, such as viewing other users' data. The vulnerability affects all versions through 5.2.8 and has been patched in version 5.3.0.

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

## Quick answers

**Is CVE-2026-106597 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-106597 being exploited in the wild.

**How severe is CVE-2026-106597?** Medium severity, with a CVSS score of 5.3, published 13 October 2026.

**Which products and versions are affected?** ThemeGrill User Registration through 5.2.8.

**Is there a fix for CVE-2026-106597?** Yes: fixed in 5.3.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-106597 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-106597?** 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 5.3.0

## Technical details

The plugin fails to properly enforce authorization checks on certain sensitive operations, allowing an unauthenticated network-based attacker to bypass access controls. This broken access control vulnerability enables unauthorized access to protected functionality and exposure of user data without requiring authentication or user interaction.

## Affected products

- ThemeGrill User Registration through 5.2.8

## Timeline

- 2026-10-02: disclosed
- 2026-10-13: advisory

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/user-registration/vulnerability/wordpress-user-registration-plugin-5-2-8-broken-access-control-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/user-registration/vulnerability/wordpress-user-registration-plugin-5-2-8-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 broken access control](https://junglewise.ai/threats/cve-2026-25450-missing-authorization-vulnerability-in-themegrill-user)