Missing authorization in wpinsider-1 Simple Membership
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
The Simple Membership plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.7.5. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to deactivate arbitrary member accounts by forging a charge.refunded webhook event containing a victim's subscription ID, setting the target member's account_state to 'inactive' and triggering cancellation hooks, transaction-record status changes, and cancellation notification emails. This vulnerability is exploitable only on installations where no Stripe webhook signing secret has been configured, which is the default out-of-the-box state; sites that have configured the stripe-webhook-signing-secret option are routed to the properly verified HMAC path and are not affected.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| wpinsider-1 | Simple Membership | up to 4.7.5 | — | No fix listed | CNA |
- Simple Membership Vendorwpinsider-1 Affected up to 4.7.5 Fixed in — No fix listed CNA
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:simple-membership-plugin:simple_membership:*:*:*:*:*:*:*:* | — | — | wpinsider-1 |
- cpe:2.3:a:simple-membership-plugin:simple_membership:*:*:*:*:*:*:*:* Versions — — ·wpinsider-1
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-12093
- 2026-10-03 Alias added: GHSA-6q57-f535-3g3g
References
Other 10
- https://www.wordfence.com/threat-intel/vulnerabilities/id/2f91a7c3-ee0e-48e9-aa5f-dfc1160bbc09?source=cve
- https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.7.4/ipn/swpm-stripe-webhook-handler.php#L297
- https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.7.4/ipn/swpm-stripe-webhook-handler.php#L71
- https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.7.4/classes/class.swpm-wp-loaded-tasks.php#L96
- https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.7.4/ipn/swpm_handle_subsc_ipn.php#L381
- https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.7.3/ipn/swpm-stripe-webhook-handler.php#L297
- https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.7.3/ipn/swpm-stripe-webhook-handler.php#L71
- https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.7.3/classes/class.swpm-wp-loaded-tasks.php#L96
- https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.7.3/ipn/swpm_handle_subsc_ipn.php#L381
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3573852%40simple-membership&new=3573852%40simple-membership&sfp_email=&sfph_mail=
More wpinsider-1 vulnerabilities
- TI-2022-04084 Simple Membership < 4.2.2 - Contributor+ Stored XSS CVSS 3.1MEDIUM 5.4
- TI-2023-22342 WordPress Simple Membership plugin <= 4.3.4 - Unauthenticated Membership Role Privilege Escalation vulnerability CVSS 3.1CRITICAL 9.8
- TI-2022-02140 Simple Membership < 4.1.3 - Unauthenticated Membership Privilege Escalation CVSS 3.1CRITICAL 9.8
- TI-2019-10675 The Simple Membership plugin before 3.8.5 for WordPress has CSRF affecting the Bulk Operation section. CVSS 3.0HIGH 8.8
- TI-2023-22341 WordPress Simple Membership plugin <= 4.3.4 - Authenticated Account Takeover vulnerability CVSS 3.1HIGH 8.8
- TI-2024-10273 Simple Membership <= 4.5.5 - Exposure of Private Personal Information to an Unauthorized Actor CVSS 3.1HIGH 7.5
Sources
- CVE-2026-12093 · CVE Program
- CVE-2026-12093 · NVD
- FIRST EPSS
- GHSA-6q57-f535-3g3g · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences