The User Registration & Membership WordPress plugin before 5.2.8 does not check the capability of the user making a membership purchase, and does… (CVE-2026-86406)
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.
AI Analysis
Technical Summary
CVE-2026-86406 describes a vulnerability in the User Registration & Membership WordPress plugin prior to version 5.2.8. The plugin fails to check user capabilities during membership purchases and does not validate the payment method or plan submitted. Consequently, any authenticated user can be assigned the WordPress role tied to a paid plan without paying, potentially escalating privileges up to administrator if the plan is mapped to such a role.
Potential Impact
An attacker with any authenticated user account can escalate privileges to higher roles, including administrator, by exploiting the lack of capability checks and payment validation. This compromises the integrity and security of the WordPress site, allowing unauthorized administrative access.
Mitigation Recommendations
Upgrade the User Registration & Membership WordPress plugin to version 5.2.8 or later, where this vulnerability is fixed. No other mitigation guidance is provided. Patch status is not explicitly stated but the version boundary indicates a fix in 5.2.8.
The User Registration & Membership WordPress plugin before 5.2.8 does not check the capability of the user making a membership purchase, and does… (CVE-2026-86406)
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 v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-86406 describes a vulnerability in the User Registration & Membership WordPress plugin prior to version 5.2.8. The plugin fails to check user capabilities during membership purchases and does not validate the payment method or plan submitted. Consequently, any authenticated user can be assigned the WordPress role tied to a paid plan without paying, potentially escalating privileges up to administrator if the plan is mapped to such a role.
Potential Impact
An attacker with any authenticated user account can escalate privileges to higher roles, including administrator, by exploiting the lack of capability checks and payment validation. This compromises the integrity and security of the WordPress site, allowing unauthorized administrative access.
Mitigation Recommendations
Upgrade the User Registration & Membership WordPress plugin to version 5.2.8 or later, where this vulnerability is fixed. No other mitigation guidance is provided. Patch status is not explicitly stated but the version boundary indicates a fix in 5.2.8.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-23fc-j83w-rxq7
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-86406"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa741a755bf5e2cf5489bfa
Added to database: 09/14/2026, 00:36:55 UTC
Last enriched: 09/14/2026, 00:43:35 UTC
Last updated: 09/14/2026, 04:01:23 UTC
Views: 4
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