{"id":"CVE-2026-78175","title":"The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.0.7 via the `withdraw_method_field` parameter of the `tutor_save_withdraw_account` AJ…","summary":"The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.0.7 via the `withdraw_method_field` parameter of the `tutor_save_withdraw_account` AJ…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-502"],"vendor":"themeum","product":"Tutor LMS – eLearning and online course solution","affected":["tutor_lms_elearning_and_online_course_solution <= 4.0.7"],"published":"2026-09-12","updated":"2026-09-15","sourceUpdated":"2026-09-15T15:17:21.707","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-78175","references":[{"url":"https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/RestAPI.php#L190","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L204","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L213","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L217","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L44","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/changeset?reponame=&old=3690454%40tutor&new=3690454%40tutor","label":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/d0077d56-11e7-4e74-abe0-63e81db67be3?source=cve","label":"security@wordfence.com"}],"tags":["nvd","cve.org"],"epss":0.00586,"epssPercentile":0.46457,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-15T13:26:20.914058Z"},"ingestedAt":"2026-09-14T15:23:07.480Z","slug":"CVE-2026-78175","body":"## Overview\n\nThe Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.0.7 via the `withdraw_method_field` parameter of the `tutor_save_withdraw_account` AJAX handler. This is due to the handler lacking any capability or role check, relying solely on a nonce, while also passing attacker-supplied values through `esc_sql()`, which replaces every `%` character with a 66-byte HMAC placeholder token before the data is serialized and stored via `update_user_meta()`; when the meta is later retrieved, the placeholder is collapsed back to a single `%`, leaving serialized string length declarations 65 bytes greater than the actual content, and because array keys originate from entirely unescaped POST field names, `unserialize()` over-reads into attacker-controlled bytes, allowing injection of an arbitrary serialized object stream. This makes it possible for authenticated attackers, with subscriber-level access and above, to achieve remote code execution on the server by triggering the `GuzzleHttp\\Cookie\\FileCookieJar` POP chain, reachable via the `spl_autoload_register` loader in `TUTOR\\RestAPI` which loads the plugin's own bundled PayPal Composer autoloader, writing attacker-controlled content to an attacker-specified filename. This has an unauthenticated pathway when user registration is enabled, which is common for students and teachers to register, and it requires the monetization feature to be enabled.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}