Groundhogg <= 4.2.2 - Authenticated (Sales Representative+) PHP Object Injection

Deserialization of Untrusted Data
CVE CVE-2025-54053
CVSS High (7.5)
Publicly Published August 5, 2025
Last Updated August 11, 2025
Researcher 63n0
Description

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.

References

1 affected software package

Software Type Plugin
Software Slug groundhogg (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 4.2.2
Patched Version
  • 4.2.2.1
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