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CVE-2025-1562: Unauthorized Arbitrary Plugin Installation in FunnelKit Plugin for WordPress

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Overview

CVE-2025-1562 is a critical vulnerability that affects the Recover WooCommerce Cart Abandonment, Newsletter, Email Marketing, Marketing Automation By FunnelKit plugin for WordPress. This vulnerability has a high potential for system compromise and data leakage and is highly likely to be exploited by unauthenticated attackers. All versions of the plugin up to, and including, 3.5.3 are at risk. The vulnerability matters because it exposes the WordPress site to potential device compromises and data breaches that can result in reputational damage, financial loss, and legal repercussions.

Vulnerability Summary

CVE ID: CVE-2025-1562
Severity: Critical (9.8 CVSS Severity Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Unauthorized arbitrary plugin installation leading to potential system compromise or data leakage

Affected Products

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Product | Affected Versions

Recover WooCommerce Cart Abandonment, Newsletter, Email Marketing, Marketing Automation By FunnelKit Plugin for WordPress | Up to and including 3.5.3

How the Exploit Works

The vulnerability stems from a missing capability check in the install_or_activate_addon_plugins() function and a weak nonce hash. An attacker can leverage these weaknesses to install arbitrary plugins on the site without any authentication. These installed plugins can be used as a gateway to infect the website further.

Conceptual Example Code

An attacker might exploit the vulnerability through an HTTP request similar to the following:

POST /wp-admin/admin-ajax.php?action=funnelkit_go_install_addon_plugins HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
plugin=malicious_plugin_slug

In this example, “malicious_plugin_slug” refers to the slug of the arbitrary plugin the attacker wants to install. This slug is usually the name of the plugin as found in the WordPress Plugin Directory.

Mitigation

To mitigate this vulnerability, users are advised to apply the vendor patch as soon as it becomes available. In the meantime, using a web application firewall (WAF) or intrusion detection system (IDS) can serve as temporary mitigation. It is also advisable to regularly update all WordPress plugins and monitor the site for unusual activities.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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