CVE-2026-18387

Groundhogg plugin in versions up to and including 4.8.3 contains a Sensitive Data Exposure vulnerability exploitable by an unauthenticated attacker.

The Groundhogg plugin for WordPress (versions up to 4.8.3) contains a Blind SQL Injection vulnerability due to improper neutralization of special elements in SQL commands.

The Groundhogg — CRM, Newsletters, and Marketing Automation plugin for WordPress is vulnerable to privilege escalation via contact identity rebinding. The create_contact function in the v3 REST endpoint is gated only by the add_contacts capability and forwards the full payload, including user_id, to the upsert path, bypassing ownership guards. This allows attackers with Sales Representative-level access and above to rebind a contact to an Administrator's user ID and then use the v4 email-test endpoint to gain an admin session.

import_contacts Path Traversal in Groundhogg <= 4.7.1 versions.

The Groundhogg — CRM, Newsletters, and Marketing Automation WordPress plugin before version 4.7.2 does not restrict the redirect target of its email preference confirmation flow to the site's own host, allowing unauthenticated attackers to redirect visitors to an arbitrary external URL by way of a crafted link.

The Groundhogg — CRM, Newsletters, and Marketing Automation WordPress plugin before 4.5.13 does not validate or escape values submitted to some optional web form fields before storing and outputting them in an administrative area, allowing unauthenticated users to perform Stored Cross-Site Scripting attacks against high privilege users.

The Groundhogg plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to and including 4.5.2. The REST endpoint GET /wp-json/gh/v4/contacts/<id> only checks the view_contacts capability, not view_others_contacts, allowing authenticated attackers (e.g., Sales Rep role) to read any contact record, including PII, contact meta, owner IDs, admin edit URLs, and full capability sets of linked WordPress users.

The Groundhogg WordPress plugin up to version 4.4.1 contains a Path Traversal vulnerability that allows unauthorized access to files outside the restricted directory.

The Groundhogg plugin for WordPress (versions up to 4.5.8) is vulnerable to SQL injection via the 'select' parameter. An authenticated attacker with custom-level access or higher can append additional SQL queries, enabling extraction of sensitive database information.

The Groundhogg plugin for WordPress (versions up to 4.5.5) is vulnerable to generic SQL injection via the 'query[select]' parameter. Insufficient escaping and lack of prepared statements allow authenticated attackers with Sales Representative-level access or higher to append additional SQL queries, potentially extracting sensitive database information.