CVE-2026-12251

Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin < 2.12.1 - Unauthenticated Privilege Escalation

2026-08-05 00:00

Strategic Overview

Status: Patched in 2.12.1
Affected Plugin: Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
Affected Version: < 2.12.1
CVSS: 7.3High
Weakness type: CWE-266 · Incorrect Privilege Assignment
CVE: CVE-2026-12251

View all Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin vulnerabilities

At a glance

CVE-2026-12251 is a high-severity Incorrect Privilege Assignment vulnerability in the Ultimate Member WordPress plugin, affecting versions < 2.12.1. It carries a CVSS score of 7.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 2.12.1; sites on affected versions should update now. Disclosed August 2026, reported by Haitam Lazaar.

Vulnerability Overview

The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to Privilege Escalation in all versions up to 2.12.1 (exclusive). This is due to the plugin not restricting ultimate member roles during registration. This makes it possible for unauthenticated attackers to register with select UM roles.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-266: Incorrect Privilege Assignment

A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.

Remediation

Update to version 2.12.1, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: Ultimate Member 2.12.1 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-12251 https://www.wordfence.com/threat-intel/vulnerabilities/id/0ae3cf36-ca3a-4f6d-90c3-6fb67c6862b9 https://nvd.nist.gov/vuln/detail/CVE-2026-12251

Related records

Same weakness class

9.8CVE-2023-3460: Ultimate Member <= 2.6.6 Privilege EscalationCVE-2023-3460

Other vulnerabilities in Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin

CVSS Vector

7.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityLow
AvailabilityLow

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