Key points
- CVE-2026-94388 is rated CVSS 9.3 Critical by the National Vulnerability Database.
- The flaw allows blind SQL injection in the halfdata-green-popups component.
- All versions of the plugin before 7.6.3 are affected by this security issue.
The halfdata Green Popups plugin for WordPress contains a critical security vulnerability that allows attackers to perform blind SQL injection. This flaw enables malicious actors to send crafted requests to the application, potentially extracting sensitive data from the underlying database without direct feedback on the results. The issue stems from improper neutralization of special elements used in SQL commands, a weakness categorized as CWE-89.
According to the National Vulnerability Database record for CVE-2026-94388, this vulnerability receives a CVSS score of 9.3, placing it in the critical severity range. The flaw exists in the halfdata-green-popups component and impacts all versions of the software released before 7.6.3. Administrators running older versions are exposed to potential data compromise until they apply the necessary updates.
What we know
The National Vulnerability Database identifies CVE-2026-94388 as a critical flaw in the halfdata Green Popups plugin. The vulnerability type is classified as improper neutralization of special elements in SQL commands, specifically enabling blind SQL injection. This means an attacker can infer data by observing the application's behavior rather than seeing direct error messages.
The issue affects the halfdata-green-popups software component. The NVD record states that the vulnerability is present in all versions prior to 7.6.3. There is no indication in the source material of active exploitation, but the high severity score suggests significant risk for unpatched systems.
Defender's checklist
- Verify the current version of the halfdata Green Popups plugin installed on your WordPress sites.
- Confirm whether the installed version is older than 7.6.3, which contains the unpatched vulnerability.
- Review access logs for unusual query patterns that might indicate blind SQL injection attempts.
- Ensure that database permissions for the WordPress application follow the principle of least privilege.
What analysts watch for
Teams usually monitor for anomalous database query timing or error code variations that signal blind SQL injection attempts. Analysts examine web server logs for requests containing complex logical operators or sleep commands, which are common tactics in this attack vector. They check whether the application properly sanitizes input fields before processing them. Security teams also look for unexpected changes in database records or unauthorized data exports that could indicate successful exploitation of the flaw.
What to do and how to stay safe: halfdata
- Immediately update the halfdata Green Popups plugin to version 7.6.3 or later to resolve the issue.
- Audit all WordPress installations to identify any sites still running vulnerable versions of the plugin.
- Monitor server logs for signs of SQL injection attempts, such as unusual query strings or delayed responses.
- Implement a web application firewall to filter out malicious traffic targeting known injection patterns.
Step-by-step guide: Security Advisories: Small Business Patching Strategy
General security guidance from the Malware Chronicle newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
Which versions of Green Popups are affected by CVE-2026-94388?
All versions of the halfdata Green Popups plugin prior to 7.6.3 are affected by this vulnerability.
What is the severity rating of this flaw?
The National Vulnerability Database rates CVE-2026-94388 as Critical with a CVSS score of 9.3.
How can I fix this vulnerability?
Update the halfdata Green Popups plugin to version 7.6.3 or newer to patch the blind SQL injection flaw.
