{"id":"CVE-2026-16038","aliases":["EUVD-2026-54386","GHSA-5xp8-jj53-535m"],"status":"published","title":"MStore API \u003c 4.21.0 - Unauthenticated Payment Bypass via Multiple Payment Gateways","description":"The MStore API  WordPress plugin before 4.21.0 does not verify the payment with the payment gateway before marking an order as paid on several of its payment-completion endpoints, allowing an unauthenticated attacker to mark an arbitrary order fully paid without paying and obtain goods or services for free.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00418,"percentile":0.36402,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-862"],"published":"2026-08-07T06:00:13Z","modified":"2026-08-26T16:31:16Z","products":[{"vendor":"mstore","product":"mstore api"},{"vendor":"unknown","product":"mstore api"}],"references":[{"url":"https://wpscan.com/vulnerability/6321d247-39c7-43a6-a528-202e1118a5d5/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16038"},{"url":"https://wpscan.com/vulnerability/6321d247-39c7-43a6-a528-202e1118a5d5"},{"url":"https://github.com/advisories/GHSA-5xp8-jj53-535m"}],"sources":{"cve":[{"id":"CVE-2026-16038","title":"MStore API \u003c 4.21.0 - Unauthenticated Payment Bypass via Multiple Payment Gateways","description":"The MStore API  WordPress plugin before 4.21.0 does not verify the payment with the payment gateway before marking an order as paid on several of its payment-completion endpoints, allowing an unauthenticated attacker to mark an arbitrary order fully paid without paying and obtain goods or services for free.","status":"published","published":"2026-08-07T06:00:13.25Z","modified":"2026-08-07T18:06:42.205Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:20:11.24076Z"}],"euvd":[{"id":"EUVD-2026-54386","description":"The MStore API  WordPress plugin before 4.21.0 does not verify the payment with the payment gateway before marking an order as paid on several of its payment-completion endpoints, allowing an unauthenticated attacker to mark an arbitrary order fully paid without paying and obtain goods or services for free.","status":"published","published":"2026-08-07T06:00:13Z","modified":"2026-08-07T18:06:42Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T18:02:06.573967Z"}],"ghsa":[{"id":"GHSA-5xp8-jj53-535m","title":"The MStore API  WordPress plugin before 4.21.0 does not verify the payment with the payment...","description":"The MStore API  WordPress plugin before 4.21.0 does not verify the payment with the payment gateway before marking an order as paid on several of its payment-completion endpoints, allowing an unauthenticated attacker to mark an arbitrary order fully paid without paying and obtain goods or services for free.","status":"published","published":"2026-08-07T06:30:28Z","modified":"2026-08-07T21:31:36Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T15:10:12.306859Z"}],"nvd":[{"id":"CVE-2026-16038","description":"The MStore API  WordPress plugin before 4.21.0 does not verify the payment with the payment gateway before marking an order as paid on several of its payment-completion endpoints, allowing an unauthenticated attacker to mark an arbitrary order fully paid without paying and obtain goods or services for free.","status":"published","published":"2026-08-07T06:16:55.95Z","modified":"2026-08-26T16:31:16.753Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:12:35.386166Z"}]}}