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GHSA-78VR-Q6CF-C7P6

Vulnerability from github – Published: 2026-06-19 21:15 – Updated: 2026-06-19 21:15
VLAI
Summary
Craft Commerce: Partial Payment Amount Without Lower Bound Validation
Details

Summary

The Order::setPaymentAmount() method accepts any float value without enforcing a minimum positive amount. The PaymentsController casts the user-supplied 'paymentAmount' parameter directly to float with no lower-bound check.

Details

When the store has 'Allow Partial Payment on Checkout' enabled, a user can submit a payment amount of $0.00 or even a negative value, potentially marking orders as paid without a valid transaction.

image

image

PoC

Complete instructions, including specific configuration details, to reproduce the vulnerability. image

Impact

On stores with partial payment enabled, a customer may be able to set an arbitrarily small payment amount. Gateway behavior varies — some will process $0.00 transactions, effectively giving free order fulfillment.

Remediation

image

Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Show details on source website
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.6.4"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/commerce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "5.6.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.11.1"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/commerce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0"
            },
            {
              "fixed": "4.11.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-1284",
      "CWE-20"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-19T21:15:23Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nThe `Order::setPaymentAmount()` method accepts any float value without enforcing a minimum positive amount. The PaymentsController casts the user-supplied \u0027paymentAmount\u0027 parameter directly to float with no lower-bound check. \n\n### Details\n\nWhen the store has \u0027Allow Partial Payment on Checkout\u0027 enabled, a user can submit a payment amount of $0.00 or even a negative value, potentially marking orders as paid without a valid transaction.\n\n\u003cimg width=\"690\" height=\"80\" alt=\"image\" src=\"https://github.com/user-attachments/assets/78b653a6-ccae-4ce4-b71b-fc38a7757d73\" /\u003e\n\n\u003cimg width=\"761\" height=\"200\" alt=\"image\" src=\"https://github.com/user-attachments/assets/665a235f-62c2-45fe-aa41-c3f266881c77\" /\u003e\n\n### PoC\n\n_Complete instructions, including specific configuration details, to reproduce the vulnerability._\n\u003cimg width=\"606\" height=\"144\" alt=\"image\" src=\"https://github.com/user-attachments/assets/a04a6de2-7c5f-4837-aed6-58756e246b80\" /\u003e\n\n\n### Impact\nOn stores with partial payment enabled, a customer may be able to set an arbitrarily small payment amount. Gateway behavior varies \u2014 some will process $0.00 transactions, effectively giving free order fulfillment.\n\n**Remediation**\n\n\u003cimg width=\"718\" height=\"98\" alt=\"image\" src=\"https://github.com/user-attachments/assets/aa64b696-9749-45e4-97f6-8d7299cdf1d6\" /\u003e",
  "id": "GHSA-78vr-q6cf-c7p6",
  "modified": "2026-06-19T21:15:23Z",
  "published": "2026-06-19T21:15:23Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/commerce/security/advisories/GHSA-78vr-q6cf-c7p6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/commerce/commit/9a88392b3074aa132a9455d4f4b582411df52c74"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/craftcms/commerce"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Craft Commerce: Partial Payment Amount Without Lower Bound Validation"
}



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