Stored Cross-Site Scripting Vulnerability in Groundhogg CRM Plugin
CVE-2026-81660

8.8HIGH

Key Information:

Vendor

WordPress
Status
Groundhogg — Crm, Newsletters, And Marketing Automation
Vendor
CVE Published:
30 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-81660?

The Groundhogg CRM, Newsletters, and Marketing Automation WordPress plugin prior to version 4.5.13 fails to properly validate and escape values received from optional web form fields. This flaw enables unauthenticated attackers to execute Stored Cross-Site Scripting (XSS) attacks, potentially compromising the integrity of the administrative area by executing malicious scripts in the context of high privilege users.

Affected Version(s)

Groundhogg — CRM, Newsletters, and Marketing Automation 0 < 4.5.13

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-81660 - Proof of Concept

References

https://wpscan.com/vulnerability/cfdb4107-6010-4c29-baf3-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Artus KG
WPScan
.