CVE-2021-4031: Syltek Insufficient Verification of Data Authenticity

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-03-18 · updated 2026-06-17
Weakness: CWE-345

Description

Syltek application before its 10.22.00 version, does not correctly check that a product ID has a valid payment associated to it. This could allow an attacker to forge a request and bypass the payment system by marking items as payed without any verification.

Affected products

Syltek: before 10.22.00 — fixed in 10.22.00

How to fix

Upgrade to a fixed version: Syltek 10.22.00. Check the vendor advisory for mitigations.

References

https://www.incibe-cert.es/en/early-warning/security-advisories/syltek-insufficient-verification-data-authenticity
https://www.incibe-cert.es/en/early-warning/security-advisories/syltek-insufficient-verification-data-authenticity

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