CVE-2026-81660CWE-79cross-site-scripting

CVE-2026-81660

High · published August 30, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
42.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00505 · 42.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-08-30T11:17Z
References (1)
https://wpscan.com/vulnerability/cfdb4107-6010-4c29-baf3-3111765f48c2/ · [email protected]
EPSS history
Timeline
  • 30 AUG 16:19Z
    EPSS moved — → 0%
    epss
  • 30 AUG 06:00Z
    Groundhogg < 4.5.13 - Unauthenticated Stored XSS via Web Form Dropdown/Radio Field
    cvelistv5