CVE-2020-37168

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://paiement.systempay.fr/doc/fr-FR/
https://paiement.systempay.fr/doc/fr-FR/module-de-paiement-gratuit/
https://www.exploit-db.com/exploits/48017
https://www.vulncheck.com/advisories/ecommerce-systempay-production-key-brute-force

Configurations

No configuration.

History

13 May 2026, 17:07

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-13 16:16

Updated : 2026-05-13 17:07

NVD link : CVE-2020-37168

Mitre link : CVE-2020-37168

CVE.ORG link : CVE-2020-37168

JSON object : View

Products Affected

No product.

CWE

CWE-328

Use of Weak Hash

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