CVE-2026-18548
Groundhogg <= 4.5.14 - Unauthenticated Stored Cross-Site Scripting via 'ref' Parameter
Published Oct 15, 2026 · updated Oct 15, 2026 · trainingbusinesspros Groundhogg — CRM, Newsletters, and Marketing Automation
The Groundhogg — CRM, Newsletters, and Marketing Automation plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'ref' parameter in all versions up to, and including, 4.5.14 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Timeline
Detection, updates, and resolution for this record.
Oct 15, 2026 · NIST NVD
Detected
The Groundhogg — CRM, Newsletters, and Marketing Automation plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'ref' parameter in all versions up to, and including, 4.5.14 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injec
Affected
- vendor trainingbusinesspros Groundhogg — CRM, Newsletters, and Marketing Automationversion unspecified
Sources
- CIRCL Vulnerability LookupCVE-2026-18548
The Groundhogg — CRM, Newsletters, and Marketing Automation plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'ref' parameter in all versions up to, and including, 4.5.14 due to insufficient input sanitization and output escaping. This makes it possible fo
vulnerability.circl.lu - CVE.orgCVE-2026-18548
The Groundhogg — CRM, Newsletters, and Marketing Automation plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'ref' parameter in all versions up to, and including, 4.5.14 due to insufficient input sanitization and output escaping. This makes it possible fo
cve.org - NIST NVDCVE-2026-18548
The Groundhogg — CRM, Newsletters, and Marketing Automation plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'ref' parameter in all versions up to, and including, 4.5.14 due to insufficient input sanitization and output escaping. This makes it possible fo
nvd.nist.gov