20,000 WordPress Sites Affected by Backdoor Vulnerability Allowing Malicious Admin User Creation
A critical backdoor vulnerability has been identified in the LA-Studio Element Kit for Elementor, a WordPress plugin utilized by over 20,000 active sites.
A critical backdoor vulnerability has been identified in the LA-Studio Element Kit for Elementor, a WordPress plugin utilized by over 20,000 active sites.
This security flaw allows the creation of administrator accounts without authentication, posing a risk of complete site takeover.
Tracked as CVE-2026-0920, the vulnerability has a CVSS score of 9.8, categorizing it as critical and necessitating immediate action from site administrators.
The backdoor was inserted into the plugin by a former employee of LA-Studio in December 2025. The code modification enables unauthorized administrator account creation.
The issue was discovered by security researchers Athiwat Tiprasaharn, Itthidej Aramsri, and Waris Damkham on January 12, 2026, and reported through the Wordfence Bug Bounty Program.
A critical backdoor vulnerability has been identified in the LA-Studio Element Kit for Elementor, a WordPress plugin utilized by over 20,000 active sites.
Vulnerability Name: Unauthenticated Privilege Escalation via Backdoor to Administrative User Creation CVE ID: CVE-2026-0920 CVSS Score: 9.8 (Critical) Affected Plugin: LA-Studio Element Kit for Elementor Plugin Slug: lastudio-element-kit Affected Versions: ≤ 1.5.6.3 Patched Version: 1.6.0 Active Installations: 20,000+ Attack Vector: lakit_bkrole parameter in registration request Vulnerability Type: Backdoor / Administrative User Creation Discoverers: Athiwat Tiprasaharn, Itthidej Aramsri, Waris Damkham Discovery Date: January 12, 2026 Patch Release Date: January 14, 2026 Wordfence Protection: January 13, 2026 (Premium), February 12, 2026 (Free)
The vulnerability exists in all versions up to and including 1.5.6.3. Attackers can exploit it by sending a crafted registration request containing the lakit_bkrole parameter, gaining full administrative access.
The flaw was identified within the plugin’s ajax_register_handle function and has been patched in version 1.6.0, released on January 14, 2026.
The backdoor operates through modifications within the plugin's registration handling system. The ajax_register_handle function contained obfuscated logic that checked for the lakit_bkrole parameter during user registration.
Upon detection, it triggered filters assigning administrator privileges to new accounts. The obfuscation used techniques like string manipulation and indirect function calls to evade detection during security audits.
Based on reporting by Cyber Security News.
