CVE-2025-64356 is a vulnerability identified in the f1logic Insert PHP Code Snippet WordPress plugin, affecting versions up to and including 1.4.3. The core issue is a missing authorization control that allows users with limited privileges (low-level authenticated users) to insert arbitrary PHP code snippets into the system. This occurs because the plugin incorrectly configures access control security levels, failing to properly verify whether a user is authorized to perform code insertion operations. The vulnerability is remotely exploitable over the network without requiring user interaction, but it does require the attacker to have some level of authenticated access (PR:L). The CVSS v3.1 score is 4.3 (medium severity), reflecting the low complexity of exploitation but limited impact primarily on confidentiality. The vulnerability does not affect integrity or availability, meaning it does not allow code execution that alters system behavior or causes denial of service directly, but it could expose sensitive information if exploited. No known public exploits or active exploitation in the wild have been reported as of the publication date. The vulnerability highlights the importance of proper access control enforcement in plugins that allow code insertion, as improper authorization can lead to privilege escalation or data leakage. Since the affected product is a WordPress plugin, the threat surface is primarily websites and web applications using this plugin for PHP code snippet management.

For European organizations, the impact of CVE-2025-64356 depends on the extent of the plugin's deployment within their web infrastructure. Organizations using the Insert PHP Code Snippet plugin in WordPress environments may face confidentiality risks if unauthorized users can insert PHP code snippets, potentially exposing sensitive data or configuration details. While the vulnerability does not directly compromise system integrity or availability, unauthorized code insertion could be leveraged in chained attacks or to gather information useful for further exploitation. This is particularly concerning for organizations managing sensitive customer data, intellectual property, or critical web services. The medium severity rating indicates that while the threat is not immediately critical, it requires timely remediation to prevent exploitation. European entities with multi-user WordPress environments or those that allow low-privilege users to access plugin features are at higher risk. The absence of known exploits in the wild reduces immediate urgency but does not eliminate the threat, especially as attackers often develop exploits after public disclosure. Failure to address this vulnerability could lead to reputational damage, regulatory non-compliance (e.g., GDPR if personal data is exposed), and potential financial losses.

1. Monitor for official patches or updates from the f1logic Insert PHP Code Snippet plugin vendor and apply them promptly once available. 2. Until a patch is released, restrict access to the plugin’s functionality strictly to trusted administrators by adjusting WordPress user roles and capabilities. 3. Conduct a thorough audit of user permissions to ensure that only authorized users can insert or modify PHP code snippets. 4. Implement web application firewalls (WAF) with rules to detect and block unauthorized attempts to access plugin endpoints related to code insertion. 5. Regularly review logs for suspicious activity related to plugin usage, especially attempts by low-privilege users to perform unauthorized actions. 6. Consider disabling or removing the plugin if it is not essential to reduce the attack surface. 7. Educate site administrators and developers about the risks of improper access control in plugins and enforce secure coding and configuration practices. 8. Employ security plugins that can detect unauthorized code changes or injections within WordPress environments.