{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-78175", "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "state": "PUBLISHED", "assignerShortName": "Wordfence", "dateReserved": "2026-08-23T15:39:15.798Z", "datePublished": "2026-09-12T07:39:15.920Z", "dateUpdated": "2026-09-12T07:39:15.920Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "shortName": "Wordfence", "dateUpdated": "2026-09-12T07:39:15.920Z"}, "affected": [{"vendor": "themeum", "product": "Tutor LMS \u2013 eLearning and online course solution", "versions": [{"version": "0", "status": "affected", "lessThanOrEqual": "4.0.7", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The Tutor LMS \u2013 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."}], "title": "Tutor LMS <= 4.0.7 - Authenticated (Subscriber+) PHP Object Injection to Remote Code Execution", "references": [{"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/d0077d56-11e7-4e74-abe0-63e81db67be3?source=cve"}, {"url": "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L213"}, {"url": "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L217"}, {"url": "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L204"}, {"url": "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L44"}, {"url": "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/RestAPI.php#L190"}, {"url": "https://plugins.trac.wordpress.org/changeset?reponame=&old=3690454%40tutor&new=3690454%40tutor"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-502 Deserialization of Untrusted Data", "cweId": "CWE-502", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}}], "credits": [{"lang": "en", "type": "finder", "value": "Chloe Chamberland"}, {"lang": "en", "type": "finder", "value": "Wordfence Argus"}], "timeline": [{"time": "2026-08-23T15:54:24.000Z", "lang": "en", "value": "Vendor Notified"}, {"time": "2026-09-11T18:49:43.000Z", "lang": "en", "value": "Disclosed"}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Tutor LMS \u2013 eLearning and online course solution", "vendor": "themeum", "versions": [{"lessThanOrEqual": "4.0.7", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Tutor LMS \u2013 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."}], "id": "CVE-2026-78175", "lastModified": "2026-09-12T08:16:24.507", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security@wordfence.com", "type": "Primary"}]}, "published": "2026-09-12T08:16:24.507", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/RestAPI.php#L190"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L204"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L213"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L217"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L44"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/changeset?reponame=&old=3690454%40tutor&new=3690454%40tutor"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/d0077d56-11e7-4e74-abe0-63e81db67be3?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-502"}], "source": "security@wordfence.com", "type": "Primary"}]}

{}

{}