CVE-2021-4031: Syltek application before its 10.22.00 version, does not correctly check that a product ID has a valid payment

Q: How do I fix CVE-2021-4031?

syltek: upgrade to 10.22.00. Exact commands for each OS are on this page.

Q: Is CVE-2021-4031 being exploited?

CVE-2021-4031 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-4031 affect?

CVE-2021-4031 affects syltek. Severity is high (CVSS 7.5). 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

Q: How urgent is CVE-2021-4031?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2021-4031 is a high-severity flaw (CVSS 7.5) affecting syltek. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-345
Published	2022-03-18
Last modified	2026-06-17

Publisher (CNA): Spanish National Cybersecurity Institute, S.A. (INCIBE) · Vendor: syltek

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-03-18 18:15 UTCPublished CVE record published
2026-06-17 04:18 UTCUpdated Record last modified

syltek syltek UPGRADE

Affected: < 10.22.00

Fixed in: 10.22.00

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy syltek || rpm -q syltek || syltek --version

2. UPGRADE to 10.22.00 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade syltek

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade syltek

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-4031?

syltek: upgrade to 10.22.00. Exact commands for each OS are on this page.

Is CVE-2021-4031 being exploited?

CVE-2021-4031 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-4031 affect?

CVE-2021-4031 affects syltek. Severity is high (CVSS 7.5). 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

How urgent is CVE-2021-4031?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

References

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