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CVE-2026-86406

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

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-86406

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-86406

Published

User Registration & Membership

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Unknown",
                    "product": "User Registration & Membership",
                    "versions": [
                        {
                            "status": "affected",
                            "versionType": "semver",
                            "version": "4.4.6",
                            "lessThan": "5.2.8"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON