CVE-2026-12251
Unauthenticated registration can create admin accounts via role-selection in Ultimate Member plugin.
Is CVE-2026-12251 being exploited?
Not confirmed. CVE-2026-12251 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.23% probability of exploitation in the next 30 days.
How severe is CVE-2026-12251?
CVE-2026-12251 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-12251?
Yes. A fix has been recorded for CVE-2026-12251. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-12251 affect?
CVE-2026-12251 affects Ultimate Member WordPress plugin < 2.12.1, WordPress sites with published registration forms containing role-selection fields, Sites with roles that grant administrator capabilities. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-12251?
Update Ultimate Member to >=2.12.1; remove or restrict role-selection fields; audit new admin accounts.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attackers can register with a role that has administrator capabilities and gain full admin access.
Immediate action required
- affected< 2.12.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.