{"id":"CVE-2026-115806","aliases":["EUVD-2026-109213","GHSA-g589-p4qg-x28q"],"status":"published","title":"Prime Mover \u003c= 2.2.1 - Unauthenticated PHP Object Injection via Base64-Encoded Comment during Migration Search-and-Replace","description":"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.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00549,"percentile":0.46462,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-502"],"published":"2026-10-24T04:32:10Z","modified":"2026-10-29T02:16:50Z","products":[{"vendor":"codexonics","product":"prime mover – backup and migration"}],"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"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115806"},{"url":"https://github.com/advisories/GHSA-g589-p4qg-x28q"}],"sources":{"cve":[{"id":"CVE-2026-115806","title":"Prime Mover \u003c= 2.2.1 - Unauthenticated PHP Object Injection via Base64-Encoded Comment during Migration Search-and-Replace","description":"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.","status":"published","published":"2026-10-24T04:32:10.565Z","modified":"2026-10-29T01:52:01.233Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:20:01.618694Z"}],"euvd":[{"id":"EUVD-2026-109213","description":"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.","status":"published","published":"2026-10-24T04:32:10Z","modified":"2026-10-29T01:52:01Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T16:59:18.059516Z"}],"ghsa":[{"id":"GHSA-g589-p4qg-x28q","title":"The Prime Mover – Backup and Migration plugin for WordPress is vulnerable to PHP Object Injection...","description":"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.","status":"published","published":"2026-10-24T06:30:28Z","modified":"2026-10-24T06:30:36Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T15:14:21.369076Z"}],"nvd":[{"id":"CVE-2026-115806","description":"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.","status":"published","published":"2026-10-24T05:17:04.9Z","modified":"2026-10-29T02:16:50.623Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:13:03.126833Z"}]}}