CVE-2025-9947 is a SQL Injection vulnerability classified under CWE-89, found in the Custom 404 Pro plugin for WordPress, affecting all versions up to and including 3.12.0. The flaw exists due to insufficient escaping and lack of proper preparation of the 'path' parameter in SQL queries. This improper neutralization allows authenticated users with Administrator-level access or higher to inject additional SQL commands into existing queries. The injection is time-based, enabling attackers to extract sensitive information from the database by measuring response delays. The vulnerability does not require user interaction beyond authentication and does not impact data integrity or availability, focusing primarily on confidentiality breaches. The CVSS v3.1 score is 4.9 (medium severity), reflecting network attack vector, low attack complexity, high privileges required, no user interaction, unchanged scope, high confidentiality impact, and no impact on integrity or availability. No known exploits are currently in the wild, but the vulnerability poses a risk to sites using this plugin without patches or mitigations. The plugin is widely used in WordPress environments, making affected sites potential targets for data exfiltration attacks by insiders or compromised administrators.

The primary impact of CVE-2025-9947 is unauthorized disclosure of sensitive data stored in the WordPress database, which may include user credentials, personal information, or configuration details. Since exploitation requires administrator-level access, the threat is mainly from malicious insiders or attackers who have already compromised administrative accounts. The vulnerability does not allow modification or deletion of data, nor does it cause denial of service, limiting its impact to confidentiality breaches. However, leaked data can facilitate further attacks, such as privilege escalation or lateral movement within the organization. For organizations relying on WordPress sites with the Custom 404 Pro plugin, this vulnerability could lead to exposure of critical business or user data, damaging reputation and compliance standing. The absence of known exploits reduces immediate risk, but the medium severity score and ease of exploitation by privileged users warrant prompt attention.

1. Immediately update the Custom 404 Pro plugin to a patched version once available from the vendor. 2. If no patch is available, restrict administrator access strictly to trusted personnel and monitor administrative activities closely. 3. Implement Web Application Firewall (WAF) rules to detect and block suspicious SQL injection patterns targeting the 'path' parameter. 4. Employ database query parameterization and prepared statements in custom code to prevent injection. 5. Regularly audit WordPress plugins for vulnerabilities and remove unused or unmaintained plugins. 6. Monitor logs for unusual query patterns or delays indicative of time-based SQL injection attempts. 7. Enforce strong authentication and consider multi-factor authentication for administrator accounts to reduce risk of compromise. 8. Backup databases regularly and verify integrity to enable recovery in case of data leakage or further exploitation.