Privilege Escalation in MailerPress Team MailerPress

Executive Summary

CVE-2026-57410 is a Privilege Escalation vulnerability in the WordPress MailerPress Plugin versions 2.0.2 and earlier.

This flaw allows attackers with low-privilege accounts to escalate their privileges to higher levels, potentially gaining full control over the affected website.

The vulnerability is related to incorrect privilege assignment and falls under the OWASP Top 10 category A7: Identification and Authentication Failures.

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Detection Guidance

This vulnerability affects the WordPress MailerPress Plugin versions 2.0.2 and earlier. To detect if your system is vulnerable, you should first check the installed version of the MailerPress plugin.

• Log in to your WordPress admin dashboard and navigate to the Plugins section to verify the MailerPress plugin version.
• Alternatively, use command line to check the plugin version by running: `wp plugin get mailerpress --field=version` if WP-CLI is installed.
• Monitor for unusual privilege escalations or unauthorized access attempts in your web server logs or WordPress logs.

No specific detection commands or network signatures are provided in the available resources.

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Impact Analysis

This vulnerability can have a severe impact as it allows attackers to escalate their privileges from low-level accounts to higher-level accounts.

An attacker exploiting this flaw could potentially gain full control of the website, leading to unauthorized access, data manipulation, or disruption of services.

The CVSS score of 8.8 indicates a high severity, meaning the risk posed by this vulnerability is significant and should be addressed promptly.

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Compliance Impact

This vulnerability, which allows privilege escalation, can have significant implications for compliance with standards and regulations like GDPR and HIPAA.

• GDPR: Under GDPR, organizations must implement appropriate technical and organizational measures to ensure data security. A privilege escalation vulnerability that could lead to unauthorized access or control of a system may result in a breach of personal data. This could violate GDPR's data protection principles, particularly Article 5 (principles relating to processing of personal data) and Article 32 (security of processing). Non-compliance may lead to fines or penalties.
• HIPAA: For organizations handling protected health information (PHI), HIPAA requires safeguards to ensure the confidentiality, integrity, and availability of PHI. A privilege escalation flaw that allows attackers to gain higher-level access could compromise PHI, leading to a breach. This may violate the HIPAA Security Rule, which mandates technical safeguards to protect electronic PHI. Non-compliance could result in penalties or legal action.

Additionally, the vulnerability falls under OWASP Top 10 category A7 (Identification and Authentication Failures), which is a critical area for compliance frameworks. Failure to address such vulnerabilities may indicate inadequate security controls, potentially leading to non-compliance with industry-specific regulations or standards.

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Mitigation Strategies

The primary and immediate mitigation step is to update the MailerPress plugin to version 2.0.3 or later, which contains the patch for this vulnerability.

• If updating immediately is not possible, apply the mitigation rule provided by Patchstack to block attacks targeting this vulnerability.
• Seek assistance from your hosting provider or a web developer to help implement temporary mitigations or updates.

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