Flatsome <= 3.17.5 - Unauthenticated PHP Object Injection

9.8
Deserialization of Untrusted Data
CVE CVE-2023-40555
CVSS 9.8 (Critical)
Publicly Published September 5, 2023
Last Updated January 22, 2024
Researcher Rafie Muhammad - Patchstack

Description

The Flatsome theme for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 3.17.5 via deserialization of untrusted input. This allows unauthenticated attackers to inject a PHP Object. 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 Flatsome

Software Type Theme
Software Slug flatsome
Patched? Yes
Remediation Update to version 3.17.6, or a newer patched version
Affected Version
  • <= 3.17.5
Patched Version
  • 3.17.6

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