Themify Popup <= 1.4.3 - Authenticated (Contributor+) PHP Object Injection

7.5
Deserialization of Untrusted Data
CVE CVE-2026-56037
CVSS 7.5 (High)
Publicly Published June 23, 2026
Last Updated July 10, 2026
Researcher 0xd4rk5id3 - EnvoraSec

Description

The Themify Popup plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 1.4.3 via deserialization of untrusted input. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

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Vulnerability Details for Themify Popup

Software Type Plugin
Software Slug themify-popup (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.4.4, or a newer patched version
Affected Version
  • <= 1.4.3
Patched Version
  • 1.4.4

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