Description

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.

Related CPE's

Could not find any relations

References

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

Weaknesses

[email protected]

Primary
CWE-345

CVSS impact metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

7.5 · High

Information

Source identifier

[email protected]

Vulnerability status

Deferred

Published

2026-10-28T03:17:14.410Z

13 hours ago

Last modified

2026-10-28T15:24:56.033Z

55 minutes ago