CVE-2026-18387

The Groundhogg — CRM, Newsletters, and Marketing Automation plugin for WordPress is vulnerable to generic SQL Injection via the 'tag_query' parameter in all versions up to, and including, 4.5.14 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with vendor-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. Exploitation requires the attacker to trigger the vulnerable Legacy_Contact_Query code path by submitting an unknown filter type (e.g. filters[0][0][type]=force_fallback), which causes a FilterException that dispatches execution away from the modern query handler.

• CWE-89

• https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.5.14/api/v4/contacts-api.php#L230
• https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.5.14/includes/contact-query.php#L2599
• https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.5.14/includes/legacy-contact-query.php#L548
• https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.5.14/includes/tag-query.php#L393
• https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.5.14/includes/tag-query.php#L415
• https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.5.6/api/v4/contacts-api.php#L230
• https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.5.6/includes/contact-query.php#L2599
• https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.5.6/includes/legacy-contact-query.php#L548
• https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.5.6/includes/tag-query.php#L393
• https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.5.6/includes/tag-query.php#L415
• https://plugins.trac.wordpress.org/changeset?reponame=&old=3643654%40groundhogg&new=3643654%40groundhogg
• https://www.wordfence.com/threat-intel/vulnerabilities/id/04881aac-9d3b-48c0-b095-e91797df46e3?source=cve

Published

Aug 15, 2026

Last Modified

Aug 20, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-18378A flaw was found in koku-metrics-operator. The operator's Co…6.8
• CVE-2026-1838The Hostel plugin for WordPress is vulnerable to Reflected C…6.1
• CVE-2026-18381A flaw was found in the koku-metrics-operator for Red Hat Op…7.6
• CVE-2026-18382A flaw was found in koku-metrics-operator. The operator's Co…6.8
• CVE-2026-18385The The Paid Membership Plugin, Ecommerce, User Registration…5.4
• CVE-2026-18386The WP BackItUp Community Edition plugin for WordPress is vu…4.9
• CVE-2026-1839A vulnerability in the HuggingFace Transformers library, spe…7.8
• CVE-2026-18391The WooCommerce Subscriptions WordPress plugin before 9.1.0 …9.8
• CVE-2026-18392Rejected reason: ** REJECT ** DO NOT USE THIS CANDIDATE NUMB…
• CVE-2026-18393A flaw was found in FFmpeg. The tdsc_load_cursor() function …5.4
• CVE-2026-18394Incorrect authorization in the http_request tool in Strands …7.4
• CVE-2026-18395The Child Pages Card WordPress plugin before 1.09 does not s…5.4