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CVE-2026-18548

HIGH 7.2 CVSS 3.1
Published
October 15, 2026
Last modified
October 15, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Description

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.

Affected WordPress components

  • Groundhogg — CRM, Newsletters, and Marketing Automation Plugin · groundhogg
    Confirmed match Active
    Up to and including 4.5.14
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • trainingbusinesspros Groundhogg — CRM, Newsletters, and Marketing Automation — Up to and including 4.5.14

References

  • 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
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/791ee926-edd9-4615-9a46-1d8836938fd9?source=cve
  • nvd.nist.gov Official NVD record