# CVE-2026-93428: Ultimate Member WordPress plugin authorization bypass in member profile fields

Source: https://junglewise.ai/threats/cve-2026-93428-the-ultimate-member-user-profile-registration-login-member  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-03. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-93428 · Severity: high · CVSS 7.5 · Published 2026-10-03

The Ultimate Member plugin for WordPress is a user profile and membership management tool. An unauthenticated attacker can bypass access controls and view privacy-restricted member profile fields — including data marked as visible only to the profile owner, members, or specific roles — by making direct requests to a publicly accessible API endpoint. This allows unauthorized exposure of sensitive member information.

Technologies: [Ultimate Member](https://junglewise.ai/threats/technologies/ultimate-member). Vendors: [Ultimate Member](https://junglewise.ai/threats/vendors/ultimate-member).

## Quick answers

**Is CVE-2026-93428 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-93428 being exploited in the wild.

**How severe is CVE-2026-93428?** High severity, with a CVSS score of 7.5, published 3 October 2026.

**Which products and versions are affected?** Ultimate Member up to and including 2.13.1.

**Is there a fix for CVE-2026-93428?** Yes: fixed in 2.14.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-93428 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-93428?** Check whether you run Ultimate Member 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 2.14.0

## Technical details

The vulnerability is an authorization bypass in the wp_ajax_nopriv_um_get_members endpoint due to improper user authorization verification. The endpoint relies on a nonce ('um-frontend-nonce') emitted via wp_localize_script to all unauthenticated visitors, which provides no meaningful access control. An unauthenticated attacker can satisfy the endpoint's authentication requirements and query member profile fields regardless of privacy restrictions (owner-only, members-only, or role-restricted).

## Affected products

- Ultimate Member Ultimate Member up to and including 2.13.1

## Timeline

- 2026-10-03: disclosed
- 2026-09-29: patched

## References

- [https://github.com/ultimatemember/ultimatemember/releases/tag/2.14.0](https://github.com/ultimatemember/ultimatemember/releases/tag/2.14.0)
- [https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/core/class-ajax-common.php](https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/core/class-ajax-common.php)

## Related threats

- [Ultimate Member plugin stored cross-site scripting in textarea field](https://junglewise.ai/threats/cve-2026-116621-the-ultimate-member-user-profile-registration-login-member)
- [Ultimate Member plugin PHP object injection](https://junglewise.ai/threats/cve-2026-115968-deserialization-of-untrusted-data-vulnerability-in-ultimate)
- [Ultimate Member WordPress plugin Stored XSS in user_url parameter](https://junglewise.ai/threats/cve-2026-107625-the-ultimate-member-user-profile-registration-login-member)
- [Ultimate Member privilege escalation in role assignment](https://junglewise.ai/threats/cve-2026-96539-incorrect-privilege-assignment-vulnerability-in-ultimate-member)
- [Ultimate Member privilege escalation in user authorization](https://junglewise.ai/threats/cve-2026-96451-authorization-bypass-through-user-controlled-key-vulnerability-in)