CVE-2026-19423 Ultimate Member 2.6.7 - 2.12.1 - Unauthenticated Privilege Escalation via Role Field on Profile Forms
Unauthenticated attackers can escalate privileges to administrator by manipulating role fields during registration in the Ultimate Member WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19423?
CVE-2026-19423 is a high-severity vulnerability in Unknown Ultimate Member, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Ultimate Member WordPress plugin before 2.13.0 does not validate a submitted role selection when it cannot resolve the set of roles a profile form permits, and screens the value against the site's registered role names rather than against the form's own allow-list, allowing unauthenticated users who register through the Ultimate Member WordPress plugin before 2.13.0's own form to grant themselves arbitrary capabilities and reach administrator-equivalent access.
Weakness: CWE-269
Which versions are affected by CVE-2026-19423?
How do I fix CVE-2026-19423?
No fix has been published for CVE-2026-19423 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-19423 being exploited?
There is no known exploitation of CVE-2026-19423 in the wild and no public exploit code.
Sources
Also known as GHSA-g9rf-98hp-9vc3.