CVE-2020-37168
Ecommerce Systempay 1.0 Production Key Brute Force
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-328 |
| Vendor | paiement |
| Product | ecommerce systempay |
| Published | May 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Paiement / Ecommerce Systempay
1.0
References
exploit-db.com: https://www.exploit-db.com/exploits/48017 paiement.systempay.fr: https://paiement.systempay.fr/doc/fr-FR/ paiement.systempay.fr: https://paiement.systempay.fr/doc/fr-FR/module-de-paiement-gratuit/ vulncheck.com: https://www.vulncheck.com/advisories/ecommerce-systempay-production-key-brute-force
Credits
live3