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Vulnerability record · CVE-2026-86406 · published 13 September 2026

CVE-2026-86406: Improper privilege management vulnerability

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.

7.5 CVSS 3.1 High EPSS 0.32% · top 77.2% CWE-269 · Improper privilege management Deferred
7.5CVSS 3.1 base score
0.32%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
14 Sep 2026Last modified by NVD

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.

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

References

LinkTags
https://wpscan.com/vulnerability/0fb4ec40-3f92-4c7e-8877-8898b355d78d/

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Source: NIST National Vulnerability Database (record CVE-2026-86406), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.