CVE-2025-63056 is a vulnerability identified in the Contact Form plugin by BestWebSoft, a popular WordPress plugin used to create and manage contact forms on websites. The issue stems from missing authorization checks, meaning that certain actions or data access within the plugin can be performed or retrieved by users who do not have the appropriate permissions. Specifically, the vulnerability allows attackers with low privileges (PR:L) to bypass intended access controls due to incorrectly configured security levels. The attack vector is network-based (AV:N), requiring no user interaction (UI:N), and the scope remains unchanged (S:U). The impact is limited to confidentiality (C:L), with no direct effect on integrity or availability. This could lead to unauthorized disclosure of sensitive information submitted via contact forms, such as personal data or business inquiries. The plugin versions up to and including 4.3.5 are affected, though the exact version range is not fully specified. No known exploits have been reported in the wild yet, but the vulnerability has been publicly disclosed and assigned a CVSS v3.1 score of 4.3, indicating a medium severity level. The root cause is improper access control implementation, which is a common security oversight in web applications. Organizations using this plugin should monitor for vendor patches and consider interim mitigations such as restricting access to the plugin’s administrative functions and reviewing user roles and permissions.

For European organizations, the primary impact is the potential unauthorized disclosure of sensitive data submitted through contact forms, which may include personal identifiable information (PII), customer inquiries, or business-sensitive communications. This can lead to privacy violations, non-compliance with GDPR, reputational damage, and potential legal consequences. Since the vulnerability requires low privilege access, attackers who have compromised or registered low-level user accounts on affected websites could exploit this flaw to access data beyond their authorization. The lack of impact on integrity and availability limits the threat to data confidentiality only. However, the exposure of sensitive data can still have significant consequences, especially for SMEs and organizations handling sensitive customer information. The absence of known exploits reduces immediate risk but does not eliminate the threat, as attackers may develop exploits following public disclosure. The medium severity suggests that while urgent patching is not critical, timely remediation is necessary to prevent data leakage incidents.

1. Apply official patches from BestWebSoft as soon as they become available to address the missing authorization checks. 2. Until patches are released, restrict access to the Contact Form plugin’s administrative and configuration interfaces to trusted users only, minimizing the risk of exploitation by low-privilege users. 3. Review and tighten user roles and permissions in WordPress to ensure that only necessary users have access to sensitive plugin functions. 4. Implement web application firewalls (WAF) with rules to detect and block suspicious requests targeting the plugin endpoints. 5. Monitor logs for unusual access patterns or attempts to access restricted plugin features. 6. Conduct regular security audits of WordPress plugins and configurations to identify and remediate similar access control issues proactively. 7. Educate site administrators on the importance of timely updates and proper access control configurations.