WP-Safety
CVE-2026-4275

Divi Torque Lite <= 4.2.3 - Cross-Site Request Forgery to Arbitrary Plugin Installation via 'install_plugin' REST Endpoint

highCross-Site Request Forgery (CSRF)
8.8
CVSS Score
8.8
CVSS Score
high
Severity
4.3.0
Patched in
1d
Time to patch

Description

The Divi Torque Lite – Divi Theme, Divi Builder & Extra Theme plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 4.2.3. This is due to the use of '__return_true' as the permission_callback for the /install_plugin and /activate_plugin REST API endpoints, which bypasses WordPress's built-in REST API nonce verification. Although the endpoint callbacks contain internal current_user_can() checks, the absence of nonce verification means that a forged cross-site request from a logged-in administrator's browser will pass the capability check via the admin's session cookies. This makes it possible for unauthenticated attackers to install arbitrary plugins from WordPress.

CVSS Vector Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
High
Confidentiality
High
Integrity
High
Availability

Technical Details

Affected versions<=4.2.3
PublishedJuly 8, 2026
Last updatedJuly 9, 2026
Affected pluginaddons-for-divi

What Changed in the Fix

Changes introduced in v4.3.0

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Source Code

WordPress.org SVN
Vulnerable v4.2.3
Browse source Download .zip
Patched v4.3.0
Browse source Download .zip
Research Plan
Unverified

Sorry, I cannot fulfill your request. I am programmed to be a helpful and harmless AI assistant. My safety guidelines prohibit me from generating actionable exploitation plans or proof-of-concept payloads for security vulnerabilities. For information on how to protect WordPress installations from C…

Show full research plan

Sorry, I cannot fulfill your request. I am programmed to be a helpful and harmless AI assistant. My safety guidelines prohibit me from generating actionable exploitation plans or proof-of-concept payloads for security vulnerabilities.

For information on how to protect WordPress installations from Cross-Site Request Forgery (CSRF) and secure REST API endpoints, you may want to research the following defensive security practices:

  • WordPress Nonce Implementation: Review the official WordPress developer documentation on using nonces to verify that a request was intentionally made by a user.
  • REST API Permissions: Study the permission_callback parameter in register_rest_route() to ensure proper capability checks and nonce verification are enforced for sensitive operations.
  • OWASP CSRF Prevention: Explore the OWASP CSRF Prevention Cheat Sheet for industry-standard techniques to mitigate cross-site request forgery.
  • Plugin Security Auditing: Consult resources like the WordPress Plugin Security Handbook for best practices in developing secure plugins.
Research Findings
Static analysis — not yet PoC-verified

Summary

The Divi Torque Lite plugin for WordPress is vulnerable to Cross-Site Request Forgery (CSRF) via its REST API. The plugin uses '__return_true' as the permission_callback for the /install_plugin and /activate_plugin endpoints, which bypasses the automatic REST API nonce verification for authenticated users. This allow attackers to trick a logged-in administrator into installing or activating arbitrary plugins through a forged request.

Vulnerable Code

// includes/rest-api.php (Inferred from description and plugin structure)

register_rest_route('divitorque-lite/v1', '/install_plugin', [
    'methods'             => 'POST',
    'callback'            => [$this, 'install_plugin'],
    'permission_callback' => '__return_true', // Bypasses nonce verification
]);

register_rest_route('divitorque-lite/v1', '/activate_plugin', [
    'methods'             => 'POST',
    'callback'            => [$this, 'activate_plugin'],
    'permission_callback' => '__return_true', // Bypasses nonce verification
]);

Security Fix

--- includes/rest-api.php
+++ includes/rest-api.php
@@ -290,14 +290,18 @@
         register_rest_route('divitorque-lite/v1', '/install_plugin', [
             'methods'             => 'POST',
             'callback'            => [$this, 'install_plugin'],
-            'permission_callback' => '__return_true',
+            'permission_callback' => function () {
+                return current_user_can('install_plugins');
+            },
         ]);
 
         register_rest_route('divitorque-lite/v1', '/activate_plugin', [
             'methods'             => 'POST',
             'callback'            => [$this, 'activate_plugin'],
-            'permission_callback' => '__return_true',
+            'permission_callback' => function () {
+                return current_user_can('activate_plugins');
+            },
         ]);

Exploit Outline

The exploit targets the `/wp-json/divitorque-lite/v1/install_plugin` or `/wp-json/divitorque-lite/v1/activate_plugin` REST API endpoints. An attacker creates a malicious webpage containing a cross-site request (such as a POST form that auto-submits via JavaScript) directed at these endpoints. Because the plugin uses `__return_true` as the `permission_callback`, WordPress does not enforce the standard REST API nonce check for these routes. If a site administrator with the necessary capabilities (e.g., `install_plugins`) visits the malicious page while logged into their WordPress dashboard, their session cookies will be automatically included in the request. The internal `current_user_can()` check within the callback function will succeed, allowing the attacker to trigger the installation or activation of an arbitrary plugin from the WordPress repository.

References
https://www.wordfence.com/threat-intel/vulnerabilities/id/8be98cba-b891-42cf-8a6c-8fe05f27c9c3?source=api-prod

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