CVE-2020-37168
CRITICAL EPSS 15.7%
Published May 13, 20261mo ago · Modified Jun 17, 20262w ago
9.3 CVSS 4.0
Published May 13, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
15.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-328
References 4
- paiement.systempay.fr https://paiement.systempay.fr/doc/fr-FR/
- paiement.systempay.fr https://paiement.systempay.fr/doc/fr-FR/module-de-paiement-gratuit/
- exploit-db.com https://www.exploit-db.com/exploits/48017
- vulncheck.com https://www.vulncheck.com/advisories/ecommerce-systempay-production-key-brute-force
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.