CVE-2026-6506: InfusedWoo Pro Privilege Escalation Flaw

CVE-2026-6506 Overview

CVE-2026-6506 is a privilege escalation vulnerability in the InfusedWoo Pro plugin for WordPress, affecting all versions up to and including 5.1.2. The flaw resides in the infusedwoo_gdpr_upddata() function, which lacks authorization checks, capability checks, and restrictions on which user meta keys can be modified. Authenticated attackers with subscriber-level access or higher can update their own wp_capabilities user meta to assign themselves the Administrator role. The weakness is classified as Missing Authorization [CWE-862].

Critical Impact

Any authenticated subscriber can escalate to full Administrator privileges, achieving complete takeover of the WordPress site.

Affected Products

• InfusedWoo Pro plugin for WordPress, all versions through 5.1.2
• WordPress sites running WooCommerce with InfusedWoo Pro installed
• Sites permitting subscriber-level or higher account registration

Discovery Timeline

• 2026-05-14 - CVE-2026-6506 published to NVD
• 2026-05-14 - Last updated in NVD database

Technical Details for CVE-2026-6506

Vulnerability Analysis

The vulnerability exists in the infusedwoo_gdpr_upddata() function within the InfusedWoo Pro plugin. This function is designed to update user metadata related to GDPR preferences but exposes an AJAX endpoint accessible to any authenticated user. The function fails to verify whether the requesting user has the appropriate capability to perform the action and does not restrict which user meta keys can be modified.

Because WordPress stores user role assignments in the wp_capabilities user meta key, an attacker can pass arbitrary meta key and value pairs to this endpoint. By submitting a request that sets wp_capabilities to a serialized array containing administrator, the attacker overwrites their own role assignment. The plugin then grants full administrative privileges on the next authenticated request.

Root Cause

The root cause is twofold: missing authorization enforcement and missing input validation on the meta key parameter [CWE-862]. The function does not call current_user_can() or verify a nonce with sufficient scope. It also does not maintain an allowlist of permitted meta keys, allowing the request to target sensitive WordPress core meta such as wp_capabilities and wp_user_level.

Attack Vector

An attacker first registers a subscriber account on a vulnerable WordPress site or uses an existing low-privileged account. The attacker then sends a crafted POST request to the plugin's AJAX action that invokes infusedwoo_gdpr_upddata(). The request specifies wp_capabilities as the meta key and a serialized administrator role value. The next page load reflects Administrator-level access, granting the attacker the ability to install plugins, modify content, exfiltrate data, and execute arbitrary PHP through the theme or plugin editor.

For technical reproduction details, see the Wordfence Vulnerability Report.

Detection Methods for CVE-2026-6506

Indicators of Compromise

• Unexpected accounts with the Administrator role, particularly accounts that were recently created as subscribers
• AJAX requests targeting the infusedwoo_gdpr_upddata action containing wp_capabilities in the request body
• Modifications to the wp_usermeta table where meta_key = 'wp_capabilities' for non-administrator users
• New plugin installations, theme file edits, or PHP file creations following a subscriber login event

Detection Strategies

• Audit the wp_usermeta table for users whose wp_capabilities value contains administrator but whose initial registration role was subscriber or customer
• Review web server access logs for POST requests to admin-ajax.php referencing the InfusedWoo GDPR update action
• Correlate role-change events with the originating user account and source IP to identify self-elevation patterns

Monitoring Recommendations

• Enable WordPress audit logging for user role changes and user meta updates
• Alert on creation of new administrator accounts outside of standard provisioning workflows
• Monitor outbound requests from the web server for signs of post-compromise payload retrieval

How to Mitigate CVE-2026-6506

Immediate Actions Required

• Deactivate and remove the InfusedWoo Pro plugin until a patched version is confirmed available
• Review all WordPress user accounts and revoke administrator privileges from any unexpected users
• Force a password reset for all administrator-level accounts and rotate any API keys stored in the WordPress configuration
• Disable open user registration where business requirements permit, reducing the pool of potential attackers

Patch Information

At the time of NVD publication, no fixed version has been associated with this CVE in the available references. Site administrators should monitor the Infused Addons WooCommerce Plugin vendor site and the Wordfence Vulnerability Report for patch release notifications.

Workarounds

• Remove the plugin entirely if a patched version is not yet available
• Restrict access to wp-admin/admin-ajax.php from anonymous and low-privilege contexts using a Web Application Firewall rule
• Apply a WAF signature to block POST requests where the body contains both infusedwoo_gdpr_upddata and wp_capabilities
• Limit subscriber-level account creation and require email verification to slow automated abuse