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