CVE-2026-0844

Simple User Registration <= 6.7 - Authenticated (Subscriber+) Privilege Escalation via profile_save_field

2026-01-27 21:50
johska

Strategic Overview

Status
Patched in 6.8
Affected Plugin
MemberHero – Simple User Registration & Login
Affected Version
<= 6.7
CVSS
8.8High
Weakness type
CWE-284 · Improper Access Control
CVE
CVE-2026-0844
View all MemberHero – Simple User Registration & Login vulnerabilities

At a glance

CVE-2026-0844 is a high-severity Improper Access Control vulnerability in the MemberHero WordPress plugin, affecting versions <= 6.7. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 6.8; sites on affected versions should update now. Disclosed January 2026, reported by johska.

Vulnerability Overview

The Simple User Registration plugin for WordPress is vulnerable to privilege escalation in versions up to, and including, 6.7 due to insufficient restriction on the 'profile_save_field' function. This makes it possible for authenticated attackers, with minimal permissions such as a subscriber, to modify their user role by supplying the 'wp_capabilities' parameter during a profile update.

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 interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-284: Improper Access Control

MemberHero <= 6.7 carries this weakness at profile_save_field, and reaching it takes an account at Subscriber level or above. Improper access control means the code decides what a caller may do using something other than their actual permissions, so the decision can be wrong without any check appearing to be missing.

Whoever can shape the request decides the answer, so the protected action runs for callers the code never meant to allow. For MemberHero the fix is 6.8: builds <= 6.7 are affected, anything from 6.8 onward is not.

Remediation

Update to version 6.8, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: MemberHero 6.8 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-0844https://www.wordfence.com/threat-intel/vulnerabilities/id/bb0e77e1-7e9f-4f7e-8953-c86ab0e5ae7ahttps://nvd.nist.gov/vuln/detail/CVE-2026-0844

Related records

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