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Published : March 23, 2026

CVE-2026-2626: Divi Booster < 5.0.2 – Unauthenticated PHP Object Injection (divi-booster)

CVE ID CVE-2026-2626
Plugin divi-booster
Severity High (CVSS 8.1)
CWE 502
Vulnerable Version
Patched Version
Disclosed March 11, 2026

Analysis Overview

Atomic Edge analysis of CVE-2026-2626 (metadata-based):

This vulnerability involves a critical security flaw in the Divi Booster WordPress plugin. The absence of CWE, CVSS, and descriptive metadata prevents precise classification, but the plugin’s nature and typical WordPress plugin vulnerabilities suggest multiple potential attack vectors. The vulnerability likely resides in an AJAX handler, REST endpoint, or direct file inclusion that lacks proper security controls.

Atomic Edge research infers the root cause from common WordPress plugin vulnerability patterns. The plugin likely registers an AJAX action (e.g., `wp_ajax_divi_booster_action`) or REST API endpoint without adequate capability checks, nonce verification, or input sanitization. This creates an unauthenticated or low-privileged attack surface. Without source code, this conclusion remains an inference based on the plugin’s functionality and typical WordPress security failures.

Exploitation would target the plugin’s exposed endpoints. An attacker would likely send a POST request to `/wp-admin/admin-ajax.php` with an `action` parameter matching the vulnerable hook (e.g., `divi_booster_update_settings`). Alternatively, exploitation might target a REST route like `/wp-json/divi-booster/v1/update`. The payload would depend on the vulnerability type, potentially including SQL injection strings, PHP object injection serialized data, or arbitrary file upload multipart data. Attackers would probe for missing capability checks by sending requests without authentication cookies.

Remediation requires implementing WordPress security best practices. The plugin developers must add proper capability checks (e.g., `current_user_can(‘manage_options’)`), nonce verification (`wp_verify_nonce`), and input sanitization (`sanitize_text_field`, prepared SQL statements). For file operations, path traversal validation and file type checking are essential. The fix should also validate user input against expected data types and implement strict output escaping.

Successful exploitation could lead to severe consequences. Attackers might achieve remote code execution by uploading malicious PHP files or injecting web shells. SQL injection could allow database compromise, exposing sensitive user data. Privilege escalation might grant administrative access. Cross-site scripting could hijack user sessions. The exact impact depends on the vulnerability type, but any flaw in a theme customization plugin like Divi Booster presents significant risk.

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