EUVD-2026-39639
GHSA-97gw-4hgp-77mp
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Network-accessible with no auth or interaction; integrity impact from unauthorized membership activation; low confidentiality from accessing gated content; no availability impact applies.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Lifecycle Timeline
2DescriptionCVE.org
The User Registration & Membership - Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder plugin for WordPress is vulnerable to unauthorized modification of data due to missing validation checks in the confirm_payment() function in all versions up to, and including, 5.2.0. This makes it possible for unauthenticated attackers to bypass payment processing and activate paid memberships.
AnalysisAI
Payment bypass in WPEverest's User Registration & Membership WordPress plugin (versions up to and including 5.2.0) allows unauthenticated remote attackers to activate paid memberships without completing payment. The vulnerability stems from missing authorization checks in the confirm_payment() function (CWE-862), which fails to validate that a legitimate payment transaction occurred before granting membership access. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special attacker-side conditions are required - the CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms this is a fully remote, unauthenticated attack with low complexity against default-reachable endpoints. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N) scores 6.5 (Medium), reflecting that exploitation is fully network-accessible, requires no authentication, and involves no user interaction or special conditions - a straightforward risk profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker identifies a WordPress site running the vulnerable plugin by detecting standard WordPress membership registration pages. The attacker crafts and submits a direct HTTP POST request to the confirm_payment() endpoint, supplying a membership plan identifier but omitting or forging payment confirmation data that the function fails to validate. … |
| Remediation | Update the User Registration & Membership plugin to the version released after 5.2.0, as indicated by the patch changeset available at https://plugins.trac.wordpress.org/changeset/3552000/user-registration; the exact patched release version is not independently confirmed beyond the changeset reference, so administrators should verify the latest available version in the WordPress plugin repository. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today