CVE-2026-18548
Groundhogg <= 4.5.14 - Unauthenticated Stored Cross-Site Scripting via 'ref' Parameter
CVSS Score
7.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | trainingbusinesspros |
| Product | groundhogg — crm, newsletters, and marketing automation |
| Published | Oct 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
trainingbusinesspros / Groundhogg — CRM, Newsletters, and Marketing Automation
0 ≤ 4.5.14
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/791ee926-edd9-4615-9a46-1d8836938fd9?source=cve github.com: https://github.com/groundhoggwp/groundhogg/commit/8a6fe60e751e plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.5.15/assets/js/admin/contacts/contact-editor.js#L848
Credits
thevietronin