User Registration & Membership < 5.2.8 - Subscriber+ Privilege Escalation via Membership Purchase (CVE-2026-86406) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-86406

User Registration & Membership < 5.2.8 - Subscriber+ Privilege Escalation via Membership Purchase

Answer in brief

CVE-2026-86406 records a Unknown severity vulnerability in User Registration & Membership < 5.2.8 - Subscriber+ Privilege Escalation via Membership Purchase. The current sources do not mark it as known exploited. The current feed maps Unknown/User Registration & Membership (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 13, 2026Updated Sep 13, 2026Source checked Sep 13, 2026First seen by HOL Sep 13, 2026Material review Sep 13, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/User Registration & Membership (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Unknown/User Registration & Membershipgeneric	>=4.4.6 <5.2.8	5.2.8

Recommended response

Check inventory. Check lockfiles and deployed manifests for Unknown/User Registration & Membership.
Review the reported fix. Update Unknown/User Registration & Membership to 5.2.8 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 13, 2026

Sources and claim methodology

Source referencewpscan.com

Upstream source description

The User Registration & Membership WordPress plugin before 5.2.8 does not check the capability of the user making a membership purchase, and does not validate the payment method or the plan submitted with it, allowing any authenticated user such as a subscriber to be granted the WordPress role attached to a paid plan without paying for it. Where the site owner has mapped a plan to a privileged role, this leads to privilege escalation up to administrator.

Quoted source text, attributed separately from HOL analysis.