CVE-2024-44019 identifies a Missing Authorization vulnerability in the Contact Form 7 Campaign Monitor Extension, a WordPress plugin developed by Renzo Johnson that integrates Contact Form 7 with Campaign Monitor for email marketing purposes. The vulnerability affects all versions up to and including 0.4.67. Missing authorization means that certain functions or API endpoints within the plugin do not properly verify whether the requester has the necessary permissions to perform actions, such as submitting or modifying data. This can allow unauthenticated or unauthorized attackers to exploit these endpoints to manipulate contact form data or campaign subscriber information without proper access controls. Since Contact Form 7 is a widely used WordPress plugin for form management, and Campaign Monitor is a popular email marketing service, this extension is used by organizations to automate email list management. The lack of authorization checks could lead to unauthorized data injection, modification, or extraction, potentially exposing sensitive user data or corrupting marketing lists. No CVSS score has been assigned yet, and no public exploits have been reported, but the vulnerability is publicly disclosed and should be considered a serious risk. The vulnerability's exploitation does not require user interaction but depends on the attacker being able to send crafted requests to the vulnerable plugin endpoints. The plugin is primarily used in WordPress environments, which are common worldwide, especially in small to medium businesses and marketing teams.

The impact of CVE-2024-44019 can be significant for organizations using the Contact Form 7 Campaign Monitor Extension. Unauthorized access to form submission or campaign subscriber data can lead to data breaches, exposing personally identifiable information (PII) of customers or users. Attackers could inject malicious data, corrupt marketing lists, or manipulate campaign subscriptions, undermining the integrity of marketing communications and potentially damaging brand reputation. Additionally, unauthorized manipulation of contact forms could be leveraged to conduct phishing or social engineering attacks by injecting malicious content or redirecting users. The vulnerability could also lead to compliance violations under data protection regulations such as GDPR or CCPA if personal data is exposed or mishandled. Since the plugin is integrated into WordPress, a widely used CMS, the scope of affected systems is broad, especially among organizations relying on WordPress for their websites and marketing automation. The absence of authentication or authorization checks increases the ease of exploitation, raising the threat level. Although no exploits are currently known in the wild, the public disclosure increases the risk of future exploitation attempts.

To mitigate CVE-2024-44019, organizations should immediately audit their WordPress installations to identify the presence of the Contact Form 7 Campaign Monitor Extension and verify the version in use. Until a patch is released, it is advisable to disable or remove the vulnerable plugin to prevent exploitation. If disabling is not feasible, restrict access to the plugin’s endpoints by implementing web application firewall (WAF) rules that block unauthorized requests or limit access to trusted IP addresses. Monitoring web server logs for unusual or unauthorized requests targeting the plugin can help detect exploitation attempts early. Organizations should also ensure that their WordPress core, themes, and other plugins are up to date to reduce the overall attack surface. Once a security update or patch is available from the vendor, it should be applied promptly. Additionally, review and tighten user permissions and roles within WordPress to minimize the impact of any potential exploitation. Conduct regular security assessments and penetration testing focused on authorization controls in custom or third-party plugins.