---
id: CVE-2026-115806
title: >-
  Prime Mover <= 2.2.1 - Unauthenticated PHP Object Injection via Base64-Encoded
  Comment during Migration Search-and-Replace
summary: >-
  The Prime Mover – Backup and Migration plugin for WordPress is vulnerable to
  PHP Object Injection in all versions up to, and including, 2.2.1 via
  deserialization of untrusted input in the migration search-and-replace routine
  (recursiveUn…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-502
vendor: codexonics
product: Prime Mover – Backup and Migration
affected:
  - prime_mover_backup_and_migration <= 2.2.1
published: '2026-10-24'
updated: '2026-10-24'
sourceUpdated: '2026-10-24T04:32:10.565Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-115806'
references:
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/ab6ebd66-c7a4-402e-b51e-3f1f3183bd97?source=cve
  - url: >-
      https://plugins.trac.wordpress.org/browser/prime-mover/tags/2.2.1/utilities/PrimeMoverSearchReplace.php#L1281
  - url: >-
      https://plugins.trac.wordpress.org/browser/prime-mover/tags/2.2.1/utilities/PrimeMoverSearchReplace.php#L391
  - url: >-
      https://plugins.trac.wordpress.org/browser/prime-mover/tags/2.2.1/vendor/freemius/includes/managers/class-fs-clone-manager.php#L1636
  - url: >-
      https://plugins.trac.wordpress.org/browser/prime-mover/tags/2.2.1/vendor/freemius/includes/managers/class-fs-option-manager.php#L414
  - url: >-
      https://plugins.trac.wordpress.org/browser/prime-mover/tags/2.2.1/utilities/PrimeMoverSearchReplace.php#L422
  - url: >-
      https://plugins.trac.wordpress.org/browser/prime-mover/tags/2.2.1/utilities/PrimeMoverSearchReplace.php#L899
tags:
  - cve.org
ingestedAt: '2026-10-24T04:52:09.370Z'
---

## Overview

The Prime Mover – Backup and Migration plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 2.2.1 via deserialization of untrusted input in the migration search-and-replace routine (recursiveUnserializeReplace()). An unauthenticated attacker can store a crafted, base64-encoded serialized object in wp_comments.comment_content through the standard comment-submission endpoint (wp-comments-post.php). When an administrator subsequently performs a routine Prime Mover export or restore, the plugin base64-decodes that stored value and passes it to unserialize() with no allowed_classes restriction. A Property-Oriented Programming (POP) chain is present in the plugin's own bundled Freemius library (FS_Clone_Manager::__set → FS_Option_Manager::set_option → store() → update_option()), so no additional plugin or theme is required — the plugin ships the gadget itself.

## Affected

- `prime_mover_backup_and_migration <= 2.2.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.