Groundhogg <= 4.2.2 - Authenticated (Sales Representative+) PHP Object Injection
The WordPress CRM, Email & Marketing Automation for WordPress | Award Winner — Groundhogg plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.2.2 via deserialization of untrusted input. This makes it possible for authenticated attackers, with Custom-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Groundhogg — CRM, Newsletters, and Marketing Automation | <= 4.2.2 | 4.2.2.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-502- Platform
- WordPress
- Package
Groundhogg — CRM, Newsletters, and Marketing Automation- Disclosed
- 05.08.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 0788e172-c9f0-4aa5-806b-183491f92bc3 - Wordfence Intelligence
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Copyright 2012-2026 Defiant Inc.
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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.
- 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
- 2019: 3
- 2020: 0
- 2021: 0
- 2022: 0
- 2023: 10
- 2024: 2
- 2025: 8
- 2026: 18
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Groundhogg <= 4.2.2 - Authenticated (Sales Representative+) PHP Object Injection this entry
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