CVE-2026-81660

Groundhogg < 4.5.13 - Unauthenticated Stored XSS via Web Form Dropdown/Radio Field

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 them and outputting them back in an administrative area, allowing unauthenticated users to perform Stored Cross-Site Scripting attacks against high privilege users.

Affected

Groundhogg — CRM, Newsletters, and Marketing Automation

CVSS v3.1 CNA

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.51% chance of exploitation in the next 30 days, 42nd percentile

Published

2026-08-30

Updated

2026-08-31

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/cfdb4107-6010-4c29-baf3-3111765f48c2/

References

• CVE Record
• NVD entry