Groundhogg <= 4.5.14 - Authenticated (Vendor+) SQL Injection via 'tag_query' Parameter
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- SQL injection
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-89.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| trainingbusinesspros | Groundhogg — CRM, Newsletters, and Marketing Automation | up to 4.5.14 | — | No fix listed | CNA |
- Groundhogg — CRM, Newsletters, and Marketing Automation Vendortrainingbusinesspros Affected up to 4.5.14 Fixed in — No fix listed CNA
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:groundhogg:groundhogg:*:*:*:*:*:*:*:* | — | — | trainingbusinesspros |
- cpe:2.3:a:groundhogg:groundhogg:*:*:*:*:*:*:*:* Versions — — ·trainingbusinesspros
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-18387
- 2026-10-03 Alias added: GHSA-4mgr-f3j8-4rg7
- 2026-10-11 EPSS moved to the 50th–90th percentile
References
Other 12
- https://www.wordfence.com/threat-intel/vulnerabilities/id/04881aac-9d3b-48c0-b095-e91797df46e3?source=cve
- https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.5.14/includes/tag-query.php#L415
- https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.5.14/includes/tag-query.php#L393
- 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/contact-query.php#L2599
- 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/4.5.6/includes/tag-query.php#L415
- 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/legacy-contact-query.php#L548
- 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/api/v4/contacts-api.php#L230
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3643654%40groundhogg&new=3643654%40groundhogg
More trainingbusinesspros vulnerabilities
- TI-2023-01346 Groundhogg Contacts < 2.7.9.4 - Admin+ SQLi CVSS 3.1HIGH 7.2
- TI-2023-01986 HollerBox < 2.1.4 - Admin+ SQL Injection CVSS 3.1MEDIUM 4.9
- TI-2019-11742 The groundhogg plugin before 1.3.5 for WordPress has… CVSS 3.0HIGH 8.8
- TI-2025-00313 Groundhogg <= 3.7.3.5 - Authenticated (Author+) Arbitrary File Upload via gh_big_file_upload Function CVSS 3.1HIGH 8.8
- TI-2026-67410 Improper privilege management in trainingbusinesspros Groundhogg — CRM, Newsletters, and… CVSS 3.1HIGH 8.8
- TI-2023-17022 WordPress Groundhogg Plugin <= 2.7.11 is vulnerable to Cross Site Request Forgery (CSRF) CVSS 3.1HIGH 8.8
Sources
- CVE-2026-18387 · CVE Program
- CVE-2026-18387 · NVD
- FIRST EPSS
- GHSA-4mgr-f3j8-4rg7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences