wpinsider-1 Simple Membership Plugin up to 4.7.5 on WordPress Setting authorization

Summaryinfo

A vulnerability marked as critical has been reported in wpinsider-1 Simple Membership Plugin up to 4.7.5 on WordPress. Affected is an unknown function of the component Setting Handler. The manipulation leads to authorization. This vulnerability is listed as CVE-2026-12093. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in wpinsider-1 Simple Membership Plugin up to 4.7.5 on WordPress and classified as critical. This issue affects an unknown code of the component Setting Handler. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was presented by Nikita Fenko. The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2026-12093 since 06/12/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/18/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-37847). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• wpinsider-1

Name

• Simple Membership Plugin

Version

• 4.7.0
• 4.7.1
• 4.7.2
• 4.7.3
• 4.7.4
• 4.7.5

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CPE 2.2info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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