CVE-2026-57685 Overview
CVE-2026-57685 is a broken access control vulnerability in the Martfury WooCommerce Marketplace WordPress theme. The flaw affects all theme versions up to and including 3.2.8. Authenticated users with Subscriber-level privileges can bypass authorization checks to access or modify functionality restricted to higher-privileged roles.
The vulnerability maps to CWE-862: Missing Authorization. Exploitation requires network access and low privileges, with no user interaction. Successful attacks impact integrity while leaving confidentiality and availability intact.
Critical Impact
Authenticated subscribers on Martfury-powered marketplaces can invoke actions reserved for higher-privileged users, enabling unauthorized modifications to marketplace data.
Affected Products
- Martfury - WooCommerce Marketplace WordPress Theme, versions <= 3.2.8
- WordPress installations using the Martfury theme with subscriber registration enabled
- WooCommerce marketplace deployments built on Martfury
Discovery Timeline
- 2026-07-02 - CVE-2026-57685 published to NVD
- 2026-07-02 - Last updated in NVD database
Technical Details for CVE-2026-57685
Vulnerability Analysis
The Martfury theme exposes functionality that fails to verify whether the calling user possesses the required capability before executing sensitive operations. Because WordPress assigns the Subscriber role to any self-registered account by default, this creates a low-barrier authorization bypass on marketplace sites accepting customer sign-ups.
The issue is classified under CWE-862: Missing Authorization. Missing authorization vulnerabilities occur when code performs privileged actions without confirming the requester holds the associated capability, role, or ownership relationship.
According to the Patchstack advisory, the flaw affects theme versions up to and including 3.2.8. Impact is limited to integrity, meaning attackers can alter data but cannot directly read protected information or crash the site.
Root Cause
The root cause is the absence of capability checks such as current_user_can() on endpoints or AJAX handlers registered by the theme. WordPress themes must explicitly validate user roles before performing state-changing actions. When these checks are missing, any authenticated user can trigger the underlying logic regardless of intended access level.
Attack Vector
The attack is delivered over the network against the WordPress site. An attacker registers a Subscriber account or uses existing credentials, then issues HTTP requests to the vulnerable theme endpoints. Because privileges required are low and no user interaction is needed, exploitation can be scripted at scale against exposed Martfury marketplaces.
Refer to the Patchstack Martfury Vulnerability advisory for technical specifics.
Detection Methods for CVE-2026-57685
Indicators of Compromise
- Unexpected POST or AJAX requests to Martfury theme endpoints originating from Subscriber-level accounts.
- Modifications to marketplace listings, vendor profiles, or product data attributed to low-privileged users.
- Sudden spikes in new Subscriber account registrations followed by administrative-style activity.
Detection Strategies
- Audit WordPress access logs for admin-ajax.php and theme-specific endpoint requests correlated with Subscriber user IDs.
- Compare user role assignments against database change logs to detect unauthorized capability changes.
- Deploy WordPress security plugins that flag missing capability checks or anomalous authenticated activity.
Monitoring Recommendations
- Enable WordPress audit logging for content, user, and settings changes with user attribution.
- Monitor for authenticated requests to theme AJAX actions with unusual parameter patterns.
- Track HTTP 200 responses to endpoints that should return 403 for Subscriber roles.
How to Mitigate CVE-2026-57685
Immediate Actions Required
- Update the Martfury theme to a version above 3.2.8 once the vendor releases a fix.
- Review and remove untrusted Subscriber accounts from affected WordPress installations.
- Restrict new user registration on Martfury marketplaces until a patch is applied.
Patch Information
Consult the Patchstack Martfury Vulnerability advisory for the latest patched version information and vendor guidance. Apply theme updates through the WordPress admin dashboard or via managed hosting update workflows.
Workarounds
- Disable open user registration by unchecking Anyone can register under Settings > General until patched.
- Deploy a web application firewall (WAF) rule to block authenticated Subscriber requests to sensitive theme endpoints.
- Restrict Subscriber capabilities using a role editor plugin to remove access to marketplace vendor functionality.
# Disable open registration via WP-CLI
wp option update users_can_register 0
# List and audit Subscriber accounts
wp user list --role=subscriber --fields=ID,user_login,user_registered,user_email
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
