CVE-2026-57626 in MailPoet Plugin
Summary
by MITRE • 07/23/2026
Cross-Site Request Forgery (CSRF) vulnerability in MailPoet allows Cross Site Request Forgery.
This issue affects MailPoet: from 5.30.0 through 5.33.0.
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Analysis
by VulDB Data Team • 07/23/2026
Cross-site request forgery vulnerabilities represent a critical class of web application security flaws that allow attackers to perform unauthorized actions on behalf of authenticated users. The identified vulnerability in MailPoet affects versions ranging from 5.30.0 through 5.33.0, creating a significant risk for WordPress site administrators who rely on this popular email marketing plugin. This vulnerability falls under the CWE-352 category, which specifically addresses cross-site request forgery conditions where web applications fail to validate the origin of requests. The flaw enables malicious actors to manipulate authenticated users into executing unintended actions against the MailPoet plugin without their knowledge or consent.
The technical implementation of this CSRF vulnerability stems from insufficient validation of request origins within the plugin's administrative interfaces. When users access MailPoet's dashboard or perform administrative tasks, the application should verify that requests originate from legitimate sources and contain appropriate security tokens to prevent unauthorized operations. However, in affected versions, these protective mechanisms were either absent or inadequately implemented, allowing attackers to craft malicious requests that could be executed by authenticated administrators. The vulnerability operates through the standard CSRF attack pattern where an attacker constructs a malicious URL or form submission that, when triggered by an administrator's browser, performs unwanted actions within the MailPoet context.
The operational impact of this vulnerability extends beyond simple data manipulation to encompass potential system compromise and unauthorized administrative access. Administrators who visit compromised websites or click on malicious links could unknowingly execute commands such as creating new user accounts, modifying email settings, deleting content, or installing malicious plugins. This risk is particularly severe in environments where administrators have elevated privileges and access to sensitive site configurations. The vulnerability enables attackers to exploit the trust relationship between users and the MailPoet plugin, potentially leading to full site compromise, data exfiltration, or the deployment of backdoors.
Organizations should immediately update to MailPoet version 5.33.1 or later to remediate this vulnerability, as the developers have implemented proper CSRF token validation mechanisms. Security teams should also conduct comprehensive audits of their WordPress installations to identify any other potentially vulnerable plugins or themes that may exhibit similar weaknesses. According to ATT&CK framework category T1548.002, adversaries can leverage such vulnerabilities to maintain persistent access through administrative compromises. Additionally, implementing proper input validation, using anti-CSRF tokens for all state-changing operations, and ensuring consistent security practices across web applications aligns with industry best practices outlined in OWASP Top Ten and NIST cybersecurity guidelines. Organizations should also consider deploying web application firewalls and monitoring for suspicious administrative activities to detect potential exploitation attempts.