Quick answers
- Is CVE-2026-19423 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-19423 being exploited in the wild.
- How severe is CVE-2026-19423?
- High severity, with a CVSS score of 8.1, published 28 August 2026.
- Which products and versions are affected?
- Ultimate Member 2.6.7 through 2.12.1.
- Is there a fix for CVE-2026-19423?
- A patch was published on 2026-08-28: Fixed in version 2.13.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-19423 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-19423?
- 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.
Technical details
The vulnerability is a privilege escalation flaw in the Ultimate Member WordPress plugin versions 2.6.7 through 2.12.1. When a profile form cannot resolve the list of permitted roles, the plugin validates submitted role values against the site's global registered roles instead of the form's own allow-list, enabling an attacker to submit an arbitrary role during unauthenticated registration. An attacker can craft a registration request specifying an administrative role, which the plugin accepts without proper validation, granting them administrator-equivalent capabilities. The issue is fixed in version 2.13.0.
Affected products
- Ultimate Member Ultimate Member 2.6.7 through 2.12.1
Timeline
- 2026-08-26: disclosed
- 2026-08-28: patched: Fixed in version 2.13.0