# CVE-2026-3688: WC Lovers WCFM Membership IDOR in wcfmvm_membership_change

Source: https://junglewise.ai/threats/cve-2026-3688-wc-lovers-wcfm-membership-idor-in-wcfmvm-membership-change  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-08. Updated: 2026-07-08  
License: CC BY 4.0 with a link back

CVE-2026-3688 · Severity: high · CVSS 8.1 · Published 2026-07-08

A vulnerability in the WCFM Membership plugin for WordPress allows users with vendor-level access to change the membership plans and roles of other users. This plugin is used to manage multi-vendor marketplaces, and this flaw could allow a vendor to inappropriately modify account permissions across the platform. This could lead to unauthorized access to vendor-only features or disruption of user account management.

Technologies: [WC Lovers WCFM Membership – WooCommerce Memberships for Multivendor Marketplace](https://junglewise.ai/threats/technologies/wcfm-membership). Vendors: [WC Lovers](https://junglewise.ai/threats/vendors/wc-lovers).

## Quick answers

**Is CVE-2026-3688 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-3688 being exploited in the wild.

**How severe is CVE-2026-3688?** High severity, with a CVSS score of 8.1, published 8 July 2026.

**Which products and versions are affected?** WC Lovers WCFM Membership – WooCommerce Memberships for Multivendor Marketplace up to, and including, 2.11.10.

**Is there a fix for CVE-2026-3688?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-3688 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-3688?** Check whether you run WC Lovers WCFM Membership – WooCommerce Memberships for Multivendor Marketplace at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is classified as an Insecure Direct Object Reference (IDOR) within the 'wcfmvm_membership_change' AJAX action. The root cause is a lack of proper authorization validation, which fails to verify if the requesting user has the permission to modify the membership details of other users. An authenticated attacker with at least 'vendor' level permissions can exploit this by sending a crafted request to change another user's membership plan, effectively forcing their role to 'wcfm_vendor'. This issue affects all versions up to and including 2.11.10.

## Affected products

- WC Lovers WCFM Membership – WooCommerce Memberships for Multivendor Marketplace up to, and including, 2.11.10

## Timeline

- 2026-07-08: advisory: NVD and Wordfence published the vulnerability details.

## References

- [https://plugins.trac.wordpress.org/changeset/3520777/wc-multivendor-membership](https://plugins.trac.wordpress.org/changeset/3520777/wc-multivendor-membership)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/8a934ccd-9330-4585-9994-838940d24980?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/8a934ccd-9330-4585-9994-838940d24980?source=cve)