CVE-2026-12251: CWE-269 Improper Privilege Management in Ultimate Member
A vulnerability in the Ultimate Member WordPress plugin before version 2.12.1 allows unauthenticated users to register with roles that have administrator capabilities due to improper filtering of roles and a disabled safeguard against privilege escalation by default.
AI Analysis
Technical Summary
CVE-2026-12251 is an improper privilege management vulnerability (CWE-269) in the Ultimate Member WordPress plugin versions prior to 2.12.1. The plugin fails to filter out administrator-level capabilities from roles selectable on registration forms. Additionally, the post-registration safeguard designed to prevent elevated account creation is disabled by default. This combination allows unauthenticated users to register with a site-defined role that has administrator privileges if such a role is selectable on a published registration form, potentially granting them full administrative access to the WordPress site.
Potential Impact
An attacker can gain administrative access to a WordPress site by registering with a role that has administrator capabilities, leading to full control over the site, including confidentiality, integrity, and availability impacts.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, administrators should ensure that registration forms do not allow selection of roles with administrator capabilities and enable any available safeguards against privilege escalation.
CVE-2026-12251: CWE-269 Improper Privilege Management in Ultimate Member
Description
A vulnerability in the Ultimate Member WordPress plugin before version 2.12.1 allows unauthenticated users to register with roles that have administrator capabilities due to improper filtering of roles and a disabled safeguard against privilege escalation by default.
CVSS v3.1
Score 8.1high
Affected software
Ultimate Member
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12251 is an improper privilege management vulnerability (CWE-269) in the Ultimate Member WordPress plugin versions prior to 2.12.1. The plugin fails to filter out administrator-level capabilities from roles selectable on registration forms. Additionally, the post-registration safeguard designed to prevent elevated account creation is disabled by default. This combination allows unauthenticated users to register with a site-defined role that has administrator privileges if such a role is selectable on a published registration form, potentially granting them full administrative access to the WordPress site.
Potential Impact
An attacker can gain administrative access to a WordPress site by registering with a role that has administrator capabilities, leading to full control over the site, including confidentiality, integrity, and availability impacts.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, administrators should ensure that registration forms do not allow selection of roles with administrator capabilities and enable any available safeguards against privilege escalation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-06-15T08:27:12.663Z
- State
- PUBLISHED
Threat ID: 6a6c42b49c2644c7f86e852b
Added to database: 07/31/2026, 06:37:40 UTC
Last enriched: 08/07/2026, 14:44:09 UTC
Last updated: 09/14/2026, 22:01:31 UTC
Views: 60
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