{"schemaVersion":3,"id":"CVE-2026-3568","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"The MStore API plugin for WordPress is vulnerable to  Insecure Direct Object Reference in all versions up to, and including, 4.18.3. This is due to the update_user_profile() function in controllers/flutter-user.php processing the 'meta_data' JSON parameter without any allowlist, blocklist, or validation of meta keys. The function reads raw JSON from php://input (line 1012), decodes it (line 1013), authenticates the user via cookie validation (line 1015), and then directly iterates over the user-supplied meta_data array passing arbitrary keys and values to update_user_meta() (line 1080) with no sanitization or restrictions. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify arbitrary user meta fields on their own accounts, including sensitive fields like wp_user_level (to escalate to administrator-level legacy checks), plugin-specific authorization flags (e.g., _wpuf_user_active, aiowps_account_status), and billing/profile fields with unsanitized values (potentially enabling Stored XSS in admin contexts). Note that wp_capabilities cannot be directly exploited this way because it requires a serialized array value, but wp_user_level (a simple integer) and numerous plugin-specific meta keys are exploitable.","dates":{"published":"2026-04-09T02:25:06.702Z","modified":"2026-04-09T12:59:11.618Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":4.3,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"wordfence","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00364,"percentile":0.28867,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.138,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00226},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00364,"percentile":0.28867}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00226,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00364,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","sc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