CVE-2026-3688: CWE-639 Authorization Bypass Through User-Controlled Key in wclovers WCFM Membership – WooCommerce Memberships for Multivendor Marketplace
The WCFM Membership – WooCommerce Memberships for Multivendor Marketplace plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.11.10. This is due to the 'wcfmvm_membership_change' AJAX action not validating user permission to modify other users. This makes it possible for authenticated attackers, with vendor level access and above, to change any user's role to 'wcfm_vendor' by changing their membership plan.
AI Analysis
Technical Summary
CVE-2026-3688 is an authorization bypass vulnerability (CWE-639) in the WCFM Membership – WooCommerce Memberships for Multivendor Marketplace plugin for WordPress. The vulnerability arises because the 'wcfmvm_membership_change' AJAX action does not verify whether the requesting user has permission to modify other users' membership plans. As a result, authenticated attackers with vendor-level privileges can escalate privileges by changing arbitrary users' roles to 'wcfm_vendor'. This affects all plugin versions up to and including 2.11.10.
Potential Impact
An attacker with vendor-level access can escalate privileges by changing any user's membership plan to 'wcfm_vendor', potentially gaining unauthorized vendor capabilities. This can lead to unauthorized modifications, data manipulation, or disruption of marketplace operations. The vulnerability does not impact confidentiality but has high impact on integrity and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict vendor-level user permissions and monitor for suspicious membership changes. Avoid granting vendor-level access to untrusted users.
CVE-2026-3688: CWE-639 Authorization Bypass Through User-Controlled Key in wclovers WCFM Membership – WooCommerce Memberships for Multivendor Marketplace
Description
The WCFM Membership – WooCommerce Memberships for Multivendor Marketplace plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.11.10. This is due to the 'wcfmvm_membership_change' AJAX action not validating user permission to modify other users. This makes it possible for authenticated attackers, with vendor level access and above, to change any user's role to 'wcfm_vendor' by changing their membership plan.
CVSS v3.1
Score 8.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-3688 is an authorization bypass vulnerability (CWE-639) in the WCFM Membership – WooCommerce Memberships for Multivendor Marketplace plugin for WordPress. The vulnerability arises because the 'wcfmvm_membership_change' AJAX action does not verify whether the requesting user has permission to modify other users' membership plans. As a result, authenticated attackers with vendor-level privileges can escalate privileges by changing arbitrary users' roles to 'wcfm_vendor'. This affects all plugin versions up to and including 2.11.10.
Potential Impact
An attacker with vendor-level access can escalate privileges by changing any user's membership plan to 'wcfm_vendor', potentially gaining unauthorized vendor capabilities. This can lead to unauthorized modifications, data manipulation, or disruption of marketplace operations. The vulnerability does not impact confidentiality but has high impact on integrity and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict vendor-level user permissions and monitor for suspicious membership changes. Avoid granting vendor-level access to untrusted users.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-03-06T23:43:39.850Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4e3f0ac9d9e3dbe30d1c61
Added to database: 07/08/2026, 12:14:02 UTC
Last enriched: 07/08/2026, 12:28:24 UTC
Last updated: 08/22/2026, 10:52:08 UTC
Views: 72
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