Vulnerability · Published Aug 30, 2026 · Assigned by WPScan

CVE-2026-81660Groundhogg < 4.5.13 - Unauthenticated Stored XSS via Web Form Dropdown/Radio Field

High 8.8

In plain English

A high-severity cross-site scripting in Groundhogg — CRM, Newsletters, and Marketing Automation from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.5%top 56.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Unknown	Groundhogg — CRM, Newsletters, and Marketing Automation	0 – before 4.5.13

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

https://wpscan.com/vulnerability/cfdb4107-6010-4c29-baf3-3111765f48c2/ exploit, vdb-entry, technical-description