Ecommerce Systempay 1.0 contains a weak cryptographic implementation vulnerability that allows attackers to brute force the 16-character production secret key used for payment signature generation. Attackers can extract payment form data and signatures from POST requests to the payment endpoint, then use SHA1 hash comparison to iteratively test key candidates until discovering the correct production key, enabling them to forge valid payment signatures and manipulate transaction amounts.
History

Thu, 14 May 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Paiement
Paiement ecommerce Systempay
Vendors & Products Paiement
Paiement ecommerce Systempay

Thu, 14 May 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 13 May 2026 15:15:00 +0000

Type Values Removed Values Added
Description Ecommerce Systempay 1.0 contains a weak cryptographic implementation vulnerability that allows attackers to brute force the 16-character production secret key used for payment signature generation. Attackers can extract payment form data and signatures from POST requests to the payment endpoint, then use SHA1 hash comparison to iteratively test key candidates until discovering the correct production key, enabling them to forge valid payment signatures and manipulate transaction amounts.
Title Ecommerce Systempay 1.0 Production Key Brute Force
Weaknesses CWE-328
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-05-14T13:35:20.830Z

Reserved: 2026-02-06T12:30:34.927Z

Link: CVE-2020-37168

cve-icon Vulnrichment

Updated: 2026-05-14T13:35:16.947Z

cve-icon NVD

Status : Deferred

Published: 2026-05-13T16:16:31.720

Modified: 2026-05-13T17:07:21.030

Link: CVE-2020-37168

cve-icon Redhat

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