EUVD-2026-76954
GHSA-23fc-j83w-rxq7
Severity by source
AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Plan-to-role mapping is a deployment condition not an attack complexity factor; exploitation mechanics are straightforward once a subscriber account exists, so AC:L; PR:L reflects required subscriber-level authentication.
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
Lifecycle Timeline
6DescriptionCVE.org
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.
AnalysisAI
Privilege escalation in the User Registration & Membership WordPress plugin (versions 4.4.6 through pre-5.2.8) allows any subscriber-level authenticated user to be granted the WordPress role attached to a paid membership plan without completing payment, by exploiting a missing capability check and absent payment method and plan validation on the purchase endpoint. Where site administrators have configured membership plans mapped to privileged WordPress roles - including administrator - this results in full privilege escalation from subscriber to administrator without financial transaction. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid WordPress account with at minimum subscriber-level privileges - the attacker must be able to authenticate to the target site. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD CVSS 3.1 vector (AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H, score 7.5) reflects network-accessible exploitation requiring subscriber-level authentication and assigns AC:H, likely accounting for the dependency on administrator-configured plan-to-role mappings for maximum impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Update the User Registration & Membership WordPress plugin to version 5.2.8 or later, which is the vendor-released fix per the EUVD affected version range and WPScan advisory at https://wpscan.com/vulnerability/0fb4ec40-3f92-4c7e-8877-8898b355d78d/. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all WordPress installations running User Registration & Membership plugin versions 4.4.6-5.2.7 and determine which membership plans are currently assigned to administrator or privileged WordPress roles. …
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Same weakness CWE-269 – Improper Privilege Management
View allSame technique Privilege Escalation
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External POC / Exploit Code
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