CVE-2026-24557 is a vulnerability identified in the Contact Form 7 GetResponse Extension developed by WEN Solutions, affecting versions up to and including 1.0.8. This extension integrates the popular WordPress Contact Form 7 plugin with the GetResponse marketing automation platform, allowing form data to be sent to GetResponse. The vulnerability involves the insertion of sensitive information into the data sent by the extension, enabling an attacker to retrieve embedded sensitive data without requiring authentication or user interaction. The CVSS v3.1 base score is 5.3 (medium severity), with an attack vector of network (remote exploitation), low attack complexity, no privileges required, no user interaction, and impact limited to confidentiality loss. The flaw does not affect data integrity or availability. Although no known exploits are currently reported in the wild, the vulnerability poses a risk of sensitive data leakage, such as personal identifiable information or business-critical data submitted via contact forms. The issue likely arises from improper handling or sanitization of data before transmission to GetResponse, potentially allowing attackers to intercept or manipulate the data flow to extract sensitive content. Since the extension is used in WordPress environments, which are common targets for attackers, the vulnerability could be leveraged in broader attack campaigns if exploited at scale.

For European organizations, the primary impact is the unauthorized disclosure of sensitive information submitted through contact forms integrated with the vulnerable extension. This could include personal data of EU citizens, triggering GDPR compliance issues and potential regulatory penalties. Confidentiality breaches can lead to reputational damage, loss of customer trust, and potential financial losses. Since the vulnerability does not affect data integrity or availability, operational disruptions are unlikely. However, organizations relying on Contact Form 7 and GetResponse for marketing or customer engagement may face indirect impacts if sensitive marketing or customer data is exposed. The risk is heightened for sectors handling sensitive or regulated data such as finance, healthcare, and e-commerce. Additionally, the remote and unauthenticated nature of the vulnerability increases the attack surface, making it accessible to a wide range of threat actors.

1. Monitor the vendor’s official channels for patches or updates addressing CVE-2026-24557 and apply them promptly once available. 2. Until a patch is released, consider disabling the Contact Form 7 GetResponse Extension or replacing it with alternative, secure integration methods. 3. Restrict access to form submission data and logs to authorized personnel only, minimizing exposure of sensitive information. 4. Implement network-level monitoring and data loss prevention (DLP) tools to detect unusual data transmissions from web servers hosting the vulnerable extension. 5. Review and harden WordPress security configurations, including limiting plugin permissions and isolating critical data flows. 6. Conduct regular security audits and penetration testing focused on web form integrations to identify similar data leakage risks. 7. Educate staff responsible for website management about the risks and signs of exploitation related to this vulnerability. 8. Ensure compliance with GDPR by documenting the vulnerability, mitigation steps, and any data breach notifications if exposure occurs.