CVE-2026-9018: Easy Elements Privilege Escalation Flaw

CVE-2026-9018 Overview

CVE-2026-9018 is a privilege escalation vulnerability in the Easy Elements for Elementor – Addons & Website Templates plugin for WordPress. The flaw affects all versions up to and including 1.4.5. The easyel_handle_register() function processes attacker-controlled custom_meta POST data and writes every key-value pair to the new user's metadata without sanitization. This allows unauthenticated attackers to overwrite the wp_capabilities user meta and register a new account with administrator privileges. The vulnerability is classified under [CWE-269] Improper Privilege Management.

Critical Impact

Unauthenticated attackers can register WordPress accounts with full administrator privileges, leading to complete site takeover.

Affected Products

• Easy Elements for Elementor – Addons & Website Templates plugin for WordPress
• All versions through 1.4.5
• WordPress sites with user registration enabled and the Login/Register widget exposed on a public page

Discovery Timeline

• 2026-05-22 - CVE-2026-9018 published to NVD
• 2026-05-22 - Last updated in NVD database

Technical Details for CVE-2026-9018

Vulnerability Analysis

The vulnerability resides in the easyel_handle_register() function, which is bound to the wp_ajax_nopriv_eel_register AJAX action. This action is accessible to unauthenticated users. After calling wp_insert_user() to create the account with a safe default role, the handler iterates over the attacker-supplied custom_meta POST array. Each key-value pair is passed to update_user_meta() without validation against an allowlist or denylist. An attacker can supply custom_meta[wp_capabilities][administrator]=1 to overwrite the role assignment performed by WordPress. The result is a fully functional administrator account created by an unauthenticated visitor.

Root Cause

The root cause is the absence of a key filter when writing user metadata. WordPress stores user roles inside the wp_capabilities meta key, which the plugin treats as just another arbitrary field. Combined with the use of the nopriv AJAX hook, the plugin grants unauthenticated callers the ability to mutate any meta key on a newly created account.

Attack Vector

Exploitation requires two preconditions. User registration must be enabled in WordPress, and at least one page must render the Login/Register widget. The widget publishes the easy_elements_nonce value into the page DOM. An attacker performs a GET request to retrieve the nonce, then issues a POST request to admin-ajax.php with the eel_register action and a crafted custom_meta[wp_capabilities][administrator]=1 parameter. The newly created user receives administrator capabilities and can log in to manage the site.

For technical details and the affected code paths, see the Wordfence Vulnerability Analysis and the WordPress Easy Elements Login/Register Code.

Detection Methods for CVE-2026-9018

Indicators of Compromise

• New WordPress user accounts with the administrator role created shortly after anonymous POST requests to admin-ajax.php?action=eel_register.
• Unexpected wp_capabilities meta entries set to administrator for recently registered users.
• HTTP POST bodies containing the parameter pattern custom_meta[wp_capabilities].
• Outbound web traffic from the site originating from a newly created admin session (plugin installation, theme upload, file editing).

Detection Strategies

• Audit the wp_users and wp_usermeta tables for accounts created since the plugin was installed and verify their assigned roles.
• Inspect web server access logs for POST requests to admin-ajax.php containing action=eel_register and custom_meta parameters.
• Monitor for the easy_elements_nonce value being requested by clients that subsequently submit registration payloads.

Monitoring Recommendations

• Alert on creation of new WordPress administrator accounts outside of normal change windows.
• Track installations and activations of plugins or themes by newly created users.
• Forward WordPress audit logs to a centralized logging or SIEM platform for correlation with web request data.

How to Mitigate CVE-2026-9018

Immediate Actions Required

• Update the Easy Elements for Elementor plugin to a version released after 1.4.5 that addresses the issue, or deactivate and remove the plugin until a patch is available.
• Review all WordPress user accounts and remove any unauthorized administrators created since the plugin was deployed.
• Rotate credentials and secrets for all legitimate administrator accounts and reset application passwords.
• Disable user registration in WordPress settings if it is not required by the site.

Patch Information

At the time of publication, the affected versions include all releases up to and including 1.4.5. Review the plugin's WordPress.org listing and the Wordfence advisory for the fixed version. Apply the vendor patch as soon as it is available.

Workarounds

• Remove or unpublish any page that renders the Login/Register widget to prevent disclosure of the easy_elements_nonce.
• Disable user registration under Settings → General by unchecking "Anyone can register".
• Add web application firewall rules that block POST requests containing custom_meta[wp_capabilities] to admin-ajax.php.
• Restrict access to admin-ajax.php for unauthenticated users where feasible, or rate-limit the eel_register action.

# Example WAF rule (ModSecurity) to block exploitation attempts
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
  "chain,phase:2,deny,status:403,id:1002026901,msg:'Block CVE-2026-9018 Easy Elements privilege escalation'"
  SecRule ARGS_NAMES "@rx custom_meta\[wp_capabilities\]" \
    "chain"
    SecRule ARGS:action "@streq eel_register" "t:lowercase"