CVE-2026-0816 identifies a SQL Injection vulnerability in the 'All push notification for WP' plugin for WordPress, present in all versions up to and including 1.5.3. The vulnerability is due to improper neutralization of special elements in the 'delete_id' parameter, which is insufficiently escaped and not properly prepared in SQL queries. This flaw allows authenticated users with administrator-level privileges to inject additional SQL commands into existing queries. The attack vector is time-based SQL Injection, which can be used to extract sensitive information from the backend database by measuring response delays. The vulnerability does not require user interaction but does require high privileges, limiting exploitation to trusted users with admin access. The CVSS v3.1 score is 4.9 (medium severity), reflecting the network attack vector, low attack complexity, and high privileges required. The vulnerability impacts confidentiality but not integrity or availability. No patches or known exploits are currently reported, but the risk remains for organizations using this plugin. The vulnerability is classified under CWE-89, a common and well-understood injection weakness. The plugin is used in WordPress environments, which are widespread, making the vulnerability relevant to many websites and services relying on this plugin for push notifications.

For European organizations, this vulnerability poses a risk primarily to the confidentiality of sensitive data stored in WordPress databases. Since exploitation requires administrator-level access, the threat is mainly from insider threats or compromised admin accounts. Successful exploitation could lead to unauthorized data disclosure, including user information, credentials, or other sensitive content managed by the WordPress site. This could result in reputational damage, regulatory non-compliance (e.g., GDPR violations), and potential financial penalties. Organizations heavily reliant on WordPress for customer engagement or internal communications using this plugin are particularly at risk. The lack of impact on integrity and availability reduces the risk of service disruption but does not diminish the importance of protecting sensitive data. The medium severity score suggests a moderate priority but should not be ignored, especially in sectors handling personal or confidential data such as finance, healthcare, and government services within Europe.

1. Immediately restrict administrator access to trusted personnel and enforce strong authentication mechanisms such as multi-factor authentication (MFA) to reduce the risk of compromised admin accounts. 2. Monitor and audit database queries and WordPress logs for unusual or suspicious activity related to the 'delete_id' parameter or other admin actions. 3. Implement Web Application Firewall (WAF) rules that detect and block SQL Injection patterns targeting the vulnerable parameter. 4. Until an official patch is released, consider disabling or removing the 'All push notification for WP' plugin if feasible, or replace it with a secure alternative. 5. Regularly update WordPress core and all plugins to their latest versions once patches become available. 6. Conduct security awareness training for administrators to recognize phishing or social engineering attempts that could lead to credential compromise. 7. Employ principle of least privilege by limiting admin rights only to necessary users and consider segregating duties to minimize risk exposure. 8. Backup WordPress databases regularly and verify backups to ensure recovery capability in case of exploitation.