Vulnerability · Published Oct 14, 2026 · Assigned by jpcert
CVE-2026-103671
Medium 4.7
In plain English
A medium-severity security flaw in AmazonPay Plugin (4.0 series) from EC-CUBE CO.,LTD.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Severity (CVSS 3.0)4.7Medium
Exploit odds (30 days)0.2%top 84.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
External control of assumed-Immutable web parameter issue exists in EC-CUBE plugin (for EC-CUBE 4 series) "AmazonPay Plugin". If exploited, the user may be redirected to an arbitrary website during the ordering process. As a result, user's account information may be obtained.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| EC-CUBE CO.,LTD. | AmazonPay V2 Plugin (4.0/4.1 series) | v1.1.7 – through v1.1.12 |
| EC-CUBE CO.,LTD. | AmazonPay V2 Plugin (4.0/4.1 series) | v1.0.0 – through v1.1.6 |
| EC-CUBE CO.,LTD. | AmazonPay V2 Plugin (4.2/4.3 series, Bundle Edition) | v4.3.1 |
| EC-CUBE CO.,LTD. | AmazonPay V2 Plugin (4.2/4.3 series) | v4.2.3 – through v4.3.1 |
| EC-CUBE CO.,LTD. | AmazonPay V2 Plugin (4.2/4.3 series) | v4.2.0 – through v4.2.2 |
| EC-CUBE CO.,LTD. | AmazonPay Plugin (4.0 series) | 0 – through v1.3.0 |
Weakness: CWE-472 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N