PatchSiren cyber security CVE debrief
CVE-2026-3396 shamimmoeen CVE debrief
The WCAPF – WooCommerce Ajax Product Filter plugin is vulnerable to time-based SQL Injection via the 'post-author' parameter in all versions up to, and including, 4.2.3 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity.
- Vendor
- shamimmoeen
- Product
- WCAPF – Ajax Product Filter for WooCommerce
- CVSS
- HIGH 7.5
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-04-08
- Original CVE updated
- 2026-07-24
- Advisory published
- 2026-04-08
- Advisory updated
- 2026-07-24
Who should care
Administrators and users of the WCAPF – WooCommerce Ajax Product Filter plugin, version 4.2.3 or earlier, should be aware of this vulnerability and take immediate action to protect their installations. This includes updating the plugin to the latest version and implementing additional security measures to prevent similar vulnerabilities.
Technical summary
The vulnerability exists in the WCAPF – WooCommerce Ajax Product Filter plugin, specifically in the handling of the 'post-author' parameter. The plugin does not properly escape user-supplied input, allowing attackers to inject malicious SQL code. This can lead to unauthorized access to sensitive data stored in the database. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. The affected versions are up to and including 4.2.3.
Defensive priority
High
Recommended defensive actions
- Update the WCAPF – WooCommerce Ajax Product Filter plugin to the latest version.
- Implement additional security measures, such as input validation and sanitization, to prevent similar vulnerabilities.
- Monitor database activity for suspicious queries.
- Review compensating controls for exposed systems while remediation is scheduled and verified.
- Check relevant monitoring, detection, and logs for exposed assets that need extra review.
- Track exceptions, retest remediated assets, and close the item only after evidence is documented.
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
Evidence notes
The CVE record was published on 2026-04-08T12:16:21.763Z and was last modified on 2026-07-24T20:10:00.147Z. The NVD entry is currently Deferred. This vulnerability affects the WCAPF – WooCommerce Ajax Product Filter plugin, specifically versions up to and including 4.2.3. The plugin's handling of the 'post-author' parameter is vulnerable to time-based SQL Injection due to insufficient escaping of user-supplied input and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. Evidence limits suggest verifying plugin versions and database query handling.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-08T12:16:21.763Z and has not been modified since then. The NVD entry is currently Deferred.