# CVE-2026-103076: ThemeGrill User Registration CSRF vulnerability

Source: https://junglewise.ai/threats/cve-2026-103076-cross-site-request-forgery-csrf-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-2026-103076 · Severity: medium · CVSS 5.4 · Published 2026-10-13

ThemeGrill User Registration is a WordPress plugin that manages user account registration and profile management on websites. A cross-site request forgery (CSRF) vulnerability in version 5.2.8 and earlier allows attackers to trick logged-in administrators or users into performing unintended actions such as changing passwords or modifying account settings by visiting malicious websites. Exploitation requires social engineering to get a user to click a malicious link, but poses a risk to account integrity and unauthorized changes.

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

## Quick answers

**Is CVE-2026-103076 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-103076 being exploited in the wild.

**How severe is CVE-2026-103076?** Medium severity, with a CVSS score of 5.4, published 13 October 2026.

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

**Is there a fix for CVE-2026-103076?** 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-2026-103076 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-103076?** 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 vulnerability is a cross-site request forgery (CSRF) flaw affecting User Registration versions through 5.2.8 that requires user interaction—a logged-in user must be tricked into performing an action via a crafted link or page. The attack exploits missing or insufficient CSRF token validation on state-changing operations, allowing an unauthenticated attacker on the network to forge requests. The fix is available in version 5.3.0.

## Affected products

- ThemeGrill User Registration through 5.2.8

## Timeline

- 2026-10-13: disclosed
- 2026-10-13: patched: Version 5.3.0 released

## 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-cross-site-request-forgery-csrf-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/user-registration/vulnerability/wordpress-user-registration-plugin-5-2-8-cross-site-request-forgery-csrf-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)