CVE-2026-12251 Ultimate Member < 2.12.1 - Unauthenticated Privilege Escalation via Role Selection Field
Unauthenticated attackers can gain administrative access by registering with a privileged role if a role-selection field is present and safeguards are disabled.
- 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-2026-12251?
CVE-2026-12251 is a high-severity vulnerability in Unknown Ultimate Member, published on 31 Jul 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 2.12.1 does not filter administrator-level capabilities from the roles it makes selectable on its registration forms, and its post-registration safeguard against elevated accounts is disabled by default, allowing unauthenticated users to register with a site-defined role that carries administrator capabilities and gain administrative access, when such a role exists and a role-selection field is present on a published registration form.
Weakness: CWE-269
Which versions are affected by CVE-2026-12251?
How do I fix CVE-2026-12251?
No fix has been published for CVE-2026-12251 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-12251 being exploited?
There is no known exploitation of CVE-2026-12251 in the wild and no public exploit code.
Sources
Also known as GHSA-x3gc-pq2r-3884.