CVE-2020-37168 — Ecommerce Systempay 1.0 Production Key Brute Force
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 s…
Published: 2026-05-13 · CVSS: 9.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7