CVE-2026-7456 Overview
CVE-2026-7456 is a missing authorization vulnerability in the Udimi Tools (udimi-optin) plugin for WordPress, affecting all versions up to and including 3.2. The plugin exposes two AJAX handlers, ajax_disconnect() and ajax_connect(), without capability checks. Authenticated users with Subscriber-level access or higher can invoke these endpoints to delete or overwrite the plugin's six configuration options, including the API key, connected Udimi user email, and tracking-script payload. The result is that a low-privilege attacker can disconnect the site from its configured Udimi account or bind it to an attacker-controlled account. The weakness is tracked under CWE-862: Missing Authorization.
Critical Impact
Any authenticated Subscriber can tamper with Udimi integration settings, replacing the API key with an attacker-supplied value and hijacking the site's tracking data flow.
Affected Products
- Udimi Tools (udimi-optin) WordPress plugin, all versions through 3.2
- WordPress sites that permit user registration at Subscriber-level or higher
- Sites relying on the plugin's Udimi API integration for tracking
Discovery Timeline
- 2026-08-05 - CVE-2026-7456 published to NVD
- 2026-08-05 - Last updated in NVD database
Technical Details for CVE-2026-7456
Vulnerability Analysis
The Udimi Tools plugin registers two AJAX actions that manage the plugin's connection to the Udimi service. Both handlers are wired through the standard wp_ajax_ hook, which authenticates the caller but does not enforce role-based authorization on its own. Neither handler validates that the caller has an administrative capability such as manage_options before mutating persistent plugin state.
The ajax_disconnect() function deletes the plugin's six stored options in a single call, including the API key, the connected Udimi user email, and the tracking-script payload delivered to visitors. The ajax_connect() function accepts request parameters and writes them back into those same options, allowing an attacker to substitute an API key they control.
Because the endpoints are reachable by any authenticated session, sites that allow open registration or any Subscriber-tier accounts are directly exposed over the network.
Root Cause
The root cause is the absence of a current_user_can() check and a validated nonce inside the two AJAX callbacks. The plugin conflates authentication with authorization, treating any logged-in user as permitted to modify integration settings that should be restricted to administrators.
Attack Vector
An attacker authenticates to the target WordPress site with a Subscriber-level (or higher) account. The attacker then issues a POST request to admin-ajax.php invoking either the connect or disconnect action registered by the plugin. In the disconnect flow, the plugin removes the six configuration options and severs the Udimi integration. In the connect flow, the attacker supplies a chosen API key and associated fields, which the plugin writes into the site options without further validation. Subsequent tracking traffic and API calls then flow through the attacker-controlled Udimi account.
Detailed source references are available in the WordPress plugin trac for udimi-optin/tags/3.2/class.php and the changeset log for the fix.
Detection Methods for CVE-2026-7456
Indicators of Compromise
- POST requests to /wp-admin/admin-ajax.php with action parameters corresponding to the plugin's connect or disconnect handlers originating from non-administrator sessions.
- Unexpected changes to the plugin's stored options, particularly the API key, connected Udimi email, and tracking-script payload.
- Sudden disappearance of Udimi configuration values in wp_options, or replacement with values that do not match the site owner's Udimi account.
Detection Strategies
- Review WordPress access logs for admin-ajax.php calls invoking Udimi plugin actions from users whose role is Subscriber, Contributor, or Author.
- Audit the wp_options table for changes to keys created by the udimi-optin plugin and correlate change timestamps with authenticated user activity.
- Deploy a Web Application Firewall (WAF) rule to alert on the specific action names used by the plugin when the requesting session lacks administrative privileges.
Monitoring Recommendations
- Enable WordPress audit logging for option changes and role-based access to admin-ajax endpoints.
- Alert on any Subscriber-tier account that successfully modifies plugin configuration data.
- Baseline outbound traffic to Udimi API endpoints to detect redirection to unfamiliar account identifiers.
How to Mitigate CVE-2026-7456
Immediate Actions Required
- Update the Udimi Tools plugin to a version later than 3.2 that includes the fix referenced in the plugin changeset.
- Rotate the Udimi API key associated with the site and verify the connected Udimi user email is correct.
- Review recent Subscriber, Contributor, and Author account registrations for suspicious activity.
Patch Information
The vendor addressed the issue in a subsequent release by adding capability and nonce checks to the affected AJAX handlers. See the Wordfence vulnerability record for the fixed version and consult the changeset diff for the exact code changes.
Workarounds
- Deactivate the Udimi Tools plugin until it can be updated on affected sites.
- Disable open user registration, or restrict new accounts to a role that cannot access admin-ajax.php authenticated actions where feasible.
- Add a WAF rule that blocks POST requests to admin-ajax.php with the plugin's connect and disconnect action values unless the requester holds an administrator session cookie.
# Example: disable open registration via wp-cli until the plugin is patched
wp option update users_can_register 0
# Deactivate the vulnerable plugin cluster-wide
wp plugin deactivate udimi-optin
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
