mews/pos through 2.0.0 contains an insufficient verification of data authenticity vulnerability that allows unauthenticated attackers to forge payment results by submitting unverified callbacks. GarantiPos, PayForPos and InterPos 3D Pay and 3D Host handlers skip check3DHash(), letting attackers post tampered status, amount or order ID fields to complete orders without paying.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 5
- StatusPublished → DeferredNVD modified 2026-10-28 15:24
- StatusReceived → PublishedNVD modified 2026-10-28 02:03
- StatusPublished → ReceivedNVD modified 2026-10-28 03:17
- CVSS8.7 (v4.0, CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N) → 8.7 (v4.0, CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)NVD modified 2026-10-28 03:17
- First seenCVSS 8.7 · mewebstudioNVD modified 2026-10-28 02:03
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 7
- https://github.com/mewebstudio/pos
- https://github.com/mewebstudio/pos/blob/50ed2bfe4f8980b8b0c47996de571943fa58d7ad/src/Gateway/InterPos.php#L134-L149
- https://github.com/mewebstudio/pos/blob/50ed2bfe4f8980b8b0c47996de571943fa58d7ad/src/Gateway/PayForPos.php#L135-L150
- https://github.com/mewebstudio/pos/commit/7c59d42bc49483c7c54999d757cb67055d9f732a
- https://github.com/mewebstudio/pos/issues/306
- https://github.com/mewebstudio/pos/pull/305
- https://www.vulncheck.com/advisories/mews-pos-through-2.0.0-missing-hash-verification-in-3d-pay-and-3d-host-callbacks