CVE-2026-81660
Received Received - Intake

Stored XSS in Groundhogg WordPress Plugin

Publication date: 2026-08-30

Last updated on: 2026-08-30

Assigner: WPScan

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.

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Meta Information

Published
2026-08-30
Last Modified
2026-08-30
Generated
2026-08-30
AI Q&A
2026-08-30
EPSS Evaluated
N/A
NVD
CVE-2026-81660
EUVD
EUVD-2026-68159

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
groundhogg groundhogg to 4.5.13 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is a stored cross-site scripting (XSS) flaw in the Groundhogg WordPress plugin versions before 4.5.13. It allows unauthenticated users to inject malicious scripts via unvalidated web form fields, which are then stored and executed when high-privilege users access the admin area.

Detection Guidance

Check if your Groundhogg plugin version is below 4.5.13. Inspect web forms for dropdown and radio fields that may accept unvalidated user input. Look for unusual script content in form submissions or administrative areas.

Impact Analysis

An attacker could exploit this to execute arbitrary scripts in the browsers of high-privilege users, potentially leading to session hijacking, unauthorized actions, or data theft. It may also enable further compromise of the WordPress site.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR's data protection requirements or HIPAA's security rules. It may result in non-compliance penalties, reputational damage, and loss of trust due to potential exposure of sensitive user data.

Mitigation Strategies

Update the Groundhogg plugin to version 4.5.13 or later immediately. Review and sanitize all form fields, especially dropdowns and radios, to ensure no malicious scripts are stored. Monitor administrative areas for unexpected script execution.

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