What the vulnerability does
01Description
The Groundhogg — CRM, Newsletters, and Marketing Automation plugin for WordPress is vulnerable to generic SQL Injection via 'query[select]' Parameter in all versions up to, and including, 4.5.5 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 Sales Representative-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. The sanitized Contact_Query code path can be bypassed by supplying an invalid filter type (e.g., query[filters][0][0][type]=invalid_filter_nonexistent), causing a FilterException to be caught and execution to fall through to the unsanitized Legacy_Contact_Query path.
Explanation of Vulnerability in Simple Terms
02Summary
Groundhogg versions up to 4.5.5 contain a SQL injection vulnerability in database query handling. An authenticated user with low privileges can craft malicious input to read sensitive data from the database, including user information and configuration details. The vulnerability requires valid login credentials but no additional user interaction.
What an attacker can do
03Attacker Capabilities
Read sensitive data from the site's database, including user records and configuration information.
Potential impact on your site
04Site Impact
User data and site configuration may be exposed to any authenticated user, even those with minimal permissions.
Conditions required to exploit
05Prerequisites
Attacker must have a valid low-privilege user account on the site.
Key dates
06Disclosure timeline
June 27, 2026
CVE published
June 29, 2026
Record updated
