CVE-2026-25430 identifies a missing authorization vulnerability in the CRM Perks Integration plugin that connects Mailchimp with several popular WordPress form plugins: Contact Form 7, WPForms, Elementor, and Ninja Forms. This vulnerability arises from improperly configured access control mechanisms, allowing unauthorized users to bypass authorization checks. The affected versions include all releases up to and including 1.2.2. The flaw specifically impacts the integration layer that synchronizes form submissions with Mailchimp mailing lists, potentially exposing sensitive subscriber data or enabling unauthorized manipulation of subscription settings. Since the vulnerability involves missing authorization, attackers do not need valid credentials or user interaction to exploit it, increasing its risk profile. The plugin is commonly used by WordPress site administrators to automate marketing and customer relationship management workflows, making this vulnerability relevant to a broad range of websites, including e-commerce, corporate, and small business sites. No patches or fixes are currently linked, and no known active exploitation has been reported. The absence of a CVSS score requires an independent severity assessment based on the nature of the vulnerability and its potential impact.

The missing authorization vulnerability can lead to unauthorized access to sensitive subscriber data managed via Mailchimp integrations, compromising confidentiality. Attackers could manipulate subscription lists, inject malicious data, or disrupt marketing workflows, impacting data integrity. The vulnerability may also allow unauthorized actions that could degrade service availability or cause reputational damage. Given the widespread use of WordPress and these popular form plugins, the scope of affected systems is extensive. Organizations relying on these integrations for customer engagement and marketing automation face risks of data breaches, regulatory non-compliance, and loss of customer trust. The ease of exploitation without authentication or user interaction further elevates the threat level. If exploited, attackers could leverage this vulnerability as a foothold for further attacks within the affected environment.

Organizations should immediately verify the version of the CRM Perks Integration plugin in use and upgrade to a patched version once available. Until a patch is released, administrators should restrict access to the WordPress admin area and plugin endpoints using web application firewalls (WAFs) or IP whitelisting. Implementing strict role-based access controls within WordPress can limit exposure. Monitoring logs for unusual access patterns related to the plugin’s integration endpoints can help detect exploitation attempts. Disabling the integration temporarily may be necessary for high-risk environments. Additionally, organizations should review Mailchimp API keys and credentials for potential compromise and rotate them if suspicious activity is detected. Regular security audits and vulnerability scanning focused on WordPress plugins are recommended to identify similar issues proactively.