Sign in
Deutsch English Español Polski
Medium

Groundhogg — CRM, Newsletters, and Marketing Automation <= 4.5.2 - Insecure Direct Object Reference

  • Disclosed: 04.08.2026
  • Updated: 11.10.2026 10:22

The Groundhogg — CRM, Newsletters, and Marketing Automation plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.5.2 via the GET /wp-json/gh/v4/contacts/<id> REST endpoint. The endpoint's permission callback checks only the role-level view_contacts capability and read_single() returns the full contact record by sequential integer ID without the object-level view_contact ownership check applied elsewhere in the codebase. This makes it possible for authenticated attackers holding view_contacts but not view_others_contacts — notably Groundhogg's built-in Sales Rep role, designed to see only its own contacts — to read any contact record on the site, including PII, contact meta, owner IDs, the admin edit URL, and (for contacts linked to a WordPress user) that user's full capability set.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
WordPress plugin Groundhogg — CRM, Newsletters, and Marketing Automation <= 4.5.2 4.5.3

References

CVSS score 6.5/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE)
CWE-639
Platform
WordPress
Package
Groundhogg — CRM, Newsletters, and Marketing Automation
Disclosed
04.08.2026
Updated
11.10.2026 10:22

Sources and licenses

Wordfence Intelligence - 7fe3d251-4edf-4d94-a946-0aa918135784 - Wordfence Intelligence

Copyright 1999-2026 The MITRE Corporation

Copyright 2012-2026 Defiant Inc.

This record contains material that is subject to copyright

Copyright 1999-2026 The MITRE Corporation

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

https://www.cve.org/Legal/TermsOfUse
Copyright 2012-2026 Defiant Inc.

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/
Wordfence Intelligence
Wordfence Intelligence - Defiant, Inc.
Copyright Defiant, Inc. All rights reserved except as granted below.
License grant, section 3.1 of the Wordfence Intelligence Terms and Conditions (January 26, 2026):

Subject to this Agreement, Company hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute the Service. Any copy you make for such purposes is authorized provided that you reproduce Company’s copyright designation, this license, and the license of any disclosed Company licensor in any such copy.

Full applicable Agreement: https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/

Vulnerability history: Groundhogg — CRM, Newsletters, and Marketing Automation

All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (41) in the archive
Total entries
41
First → latest
04.2019 10.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 15
  • Medium 26

Disclosures per year

Severity:
  1. Groundhogg <= 4.8.3 - Unauthenticated Privilege Escalation to Support User Identity Confusion
    High · 8.1 CVE-2026-92975 <= 4.8.3 4.9
  2. Groundhogg <= 4.9 - Authenticated (Custom+) Privilege Escalation to 'user' Parameter
    High · 8.8 CVE-2026-104725 <= 4.9 4.9.1
  3. Groundhogg <= 4.9 - Authenticated (Sales Person+) Privilege Escalation via Contact Identity Rebinding leading to Administrator Account Takeover to 'user_id' Parameter (v3 /contacts) chained with v4 /emails/test
    High · 8.8 CVE-2026-97644 <= 4.9 4.9.1
  4. Groundhogg — CRM, Newsletters, and Marketing Automation < 4.5.13 - Unauthenticated Stored Cross-Site Scripting
    High · 7.2 CVE-2026-81660 < 4.5.13 4.5.13
  5. Groundhogg — CRM, Newsletters, and Marketing Automation <= 4.5.2 - Insecure Direct Object Reference this entry
    Medium · 6.5 CVE-2026-11454 <= 4.5.2 4.5.3
  6. Groundhogg — CRM, Newsletters, and Marketing Automation <= 4.4.1 - Authenticated (Sales Representative+) Arbitrary File Deletion
    High · 8.1 CVE-2026-57389 <= 4.4.1 4.5
  7. Groundhogg — CRM, Newsletters, and Marketing Automation <= 4.4 - Authenticated (Sales Representative+) Arbitrary File Deletion
    High · 8.1 CVE-2026-40727 <= 4.4 4.4.1
  8. Groundhogg <= 4.2.2 - Authenticated (Sales Representative+) PHP Object Injection
    High · 7.5 CVE-2025-54053 <= 4.2.2 4.2.2.1
  9. Groundhogg <= 4.2.1 - Authenticated (Sales Rep+) Arbitrary File Upload
    High · 8.8 CVE-2025-48300 <= 4.2.1 4.2.2
  10. WordPress CRM, Email & Marketing Automation for WordPress | Award Winner — Groundhogg <= 4.1.1.2 - Authenticated (Administrator+) Arbitrary File Deletion
    High · 7.2 CVE-2025-4206 <= 4.1.1.2 4.1.2
  11. Groundhogg <= 3.7.3.5 - Authenticated (Author+) Arbitrary File Upload via gh_big_file_upload Function
    High · 8.8 CVE-2025-0394 <= 3.7.3.5 3.7.3.6
  12. Groundhogg <= 2.7.11 - Authenticated (Administrator+) SQL Injection
    High · 7.2 CVE-2023-34179 <= 2.7.11 2.7.11.1
  13. Groundhogg <= 2.7.9.8 - Cross-Site Request Forgery to Privilege Escalation
    High · 7.5 CVE-2023-2736 <= 2.7.9.8 2.7.10
  14. Groundhogg <= 2.7.9.3 - Authenticated (Administrator)+ SQL Injection
    High · 7.2 CVE-2023-1425 <= 2.7.9.3 2.7.9.4
  15. Groundhogg <= 1.3.11.13 - SQL Injection
    High · 8.8 bc69ec54-b30f-402e-ad3b-24fd680ea72b <= 1.3.11.13 2.0.8
  16. WordPress CRM, Email & Marketing Automation for WordPress | Award Winner — Groundhogg < 1.3.5 - Remote Code Execution
    High · 8.8 CVE-2019-15647 < 1.3.5 1.3.5

Know which vulnerabilities affect your application

With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.

Connect your application
DockRay newsletter

Application security in your inbox

Important vulnerabilities, actionable guidance and practical advice for your applications. Choose your technologies and follow what matters to your project.

  • A daily digest of new vulnerabilities, critical ones included.
  • Notifications about important updates.
  • Practical advice on application security and monitoring.

Leave empty to receive updates for every technology.

Privacy policy

Free to subscribe. Unsubscribe with one click in any email.