High severity · published Aug 30, 2026
CVE-2026-81660
Groundhogg < 4.5.13 - Unauthenticated Stored XSS via Web Form Dropdown/Radio Field
8.8
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GC
Groundhogg — CRM, Newsletters, and Marketing Automation ·
before 4.5.13 · source: vendor
Affected product
GC
Groundhogg — CRM, Newsletters, and Marketing Automation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-81660
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-81660
wpscan.com
https://wpscan.com/vulnerability/cfdb4107-6010-4c29-baf3-3111765f48c2/
More from Groundhogg — CRM, Newsletters, and Marketing Automation
4.7
CVE-2026-81741
Groundhogg < 4.7.2 - Open Redirect via 'redirect_to' Parameter