CVE-2023-41852 in Grow Your Email List Plugin
Summary
by MITRE • 10/25/2023
Cross-Site Request Forgery (CSRF) vulnerability in MailMunch MailMunch – Grow your Email List plugin <= 3.1.2 versions.
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Analysis
by VulDB Data Team • 10/28/2023
The CVE-2023-41852 vulnerability represents a critical cross-site request forgery flaw within the MailMunch plugin for WordPress, specifically affecting versions up to and including 3.1.2. This vulnerability resides in the plugin's handling of user requests and lacks proper validation mechanisms to verify the authenticity of incoming requests. The flaw allows malicious actors to exploit the plugin's functionality by tricking authenticated users into performing unintended actions without their knowledge or consent. The vulnerability stems from insufficient anti-CSRF token implementation within the plugin's administrative interfaces, creating a pathway for attackers to manipulate the plugin's core features through crafted malicious requests.
The technical exploitation of this vulnerability occurs through the manipulation of HTTP requests that target the plugin's administrative endpoints. Attackers can construct malicious web pages or email content that, when visited by an authenticated administrator, automatically submits requests to the vulnerable MailMunch plugin. These requests appear legitimate due to the absence of proper CSRF token validation, allowing the attacker to execute actions such as modifying plugin settings, adding new email list subscribers, or potentially escalating privileges within the WordPress environment. The vulnerability specifically affects the plugin's ability to distinguish between genuine user-initiated requests and forged requests, creating a persistent security gap that can be exploited across the lifetime of the vulnerable installation.
The operational impact of this vulnerability extends beyond simple data manipulation, as it can lead to significant compromise of email marketing operations and potential data exfiltration. An attacker who successfully exploits this vulnerability can gain unauthorized access to email list data, modify subscriber information, or even inject malicious content into the plugin's email collection forms. This compromise directly affects the integrity of the email marketing pipeline and can result in unauthorized data collection activities. The vulnerability also poses risks to the broader WordPress site security, as successful exploitation may provide attackers with additional attack vectors or serve as a foothold for further compromise of the entire WordPress installation. According to CWE-352, this vulnerability maps directly to Cross-Site Request Forgery, which is categorized under the broader class of injection vulnerabilities that can lead to privilege escalation and unauthorized access.
Organizations affected by this vulnerability should implement immediate mitigations including updating to the patched version of the MailMunch plugin, which addresses the CSRF token validation issues. Network administrators should also consider implementing additional security measures such as web application firewalls that can detect and block suspicious request patterns targeting the vulnerable endpoints. The implementation of proper CSRF token validation should be enforced at the application level, ensuring that all administrative requests require valid tokens that are tied to the user's session and cannot be reused across different contexts. Security monitoring should be enhanced to detect anomalous administrative activities that may indicate exploitation attempts, particularly focusing on unusual modifications to email list configurations or unexpected subscriber additions. According to ATT&CK framework, this vulnerability aligns with T1566 (Phishing) and T1078 (Valid Accounts) as attackers may leverage this flaw to maintain persistent access through manipulated administrative actions, making it essential for security teams to monitor for both exploitation indicators and unauthorized access patterns within their WordPress environments.