CVE-2025-29012 is a security vulnerability classified under CWE-862 (Missing Authorization) affecting the kamleshyadav CF7 7 Mailchimp Add-on, a plugin designed to integrate Contact Form 7 with Mailchimp services. This vulnerability arises due to improperly configured access control mechanisms, allowing unauthorized users to perform actions that should be restricted. Specifically, the add-on fails to enforce proper authorization checks, enabling attackers to exploit the plugin's functionality without required permissions. The vulnerability affects versions up to 2.2, with no specific lower bound version identified. According to the CVSS 3.1 scoring, it has a score of 5.3 (medium severity), with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction needed (UI:N), unchanged scope (S:U), no confidentiality impact (C:N), low integrity impact (I:L), and no availability impact (A:N). This means an attacker can remotely exploit the vulnerability without authentication or user interaction, causing limited integrity damage but no confidentiality or availability loss. The absence of known exploits in the wild suggests it is not yet actively leveraged by threat actors. However, the nature of missing authorization can allow unauthorized modification or manipulation of data or settings within the plugin's scope, potentially leading to data tampering or misuse of Mailchimp integration features. The lack of available patches at the time of publication indicates that users must rely on mitigation strategies until an official fix is released.

For European organizations using the CF7 7 Mailchimp Add-on, this vulnerability poses a risk of unauthorized modification of data or configuration related to Mailchimp integrations. While it does not directly expose sensitive data (no confidentiality impact), the integrity of marketing or customer contact data could be compromised, leading to inaccurate mailing lists, unauthorized subscription changes, or injection of malicious data. This can degrade trust in communication channels and potentially violate data protection regulations such as GDPR if personal data is mishandled. Since the vulnerability can be exploited remotely without authentication or user interaction, attackers can leverage it to disrupt marketing workflows or manipulate data at scale. Organizations relying heavily on automated email marketing and customer engagement through Mailchimp integrated with Contact Form 7 are particularly vulnerable. The medium severity rating suggests moderate risk, but the ease of exploitation and potential regulatory implications elevate the importance of addressing this issue promptly in the European context.

1. Immediate mitigation should include disabling or uninstalling the CF7 7 Mailchimp Add-on until a security patch is available. 2. Restrict network access to the affected plugin endpoints by implementing web application firewall (WAF) rules that block unauthorized requests targeting the add-on's functionality. 3. Monitor web server and application logs for unusual or unauthorized access patterns related to the plugin. 4. Employ strict role-based access controls (RBAC) at the CMS level to limit who can configure or interact with the plugin. 5. If feasible, replace the vulnerable add-on with alternative, well-maintained plugins that provide similar Mailchimp integration with verified security controls. 6. Keep all CMS and plugin components updated and subscribe to vendor or security mailing lists for timely patch releases. 7. Conduct regular security assessments and penetration testing focusing on third-party plugins and integrations to detect missing authorization issues proactively.