CVE-2021-42544: Missing Rate Limiting in Web Applications operating on Business-DNA Solutions GmbH’s TopEase® Platform Version

Q: How do I fix CVE-2021-42544?

topease: upgrade to newer than 7.1.27. Exact commands for each OS are on this page.

Q: Is CVE-2021-42544 being exploited?

CVE-2021-42544 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-2021-42544 affect?

CVE-2021-42544 affects topease. Severity is high (CVSS 7.5). Missing Rate Limiting in Web Applications operating on Business-DNA Solutions GmbH’s TopEase® Platform Version <= 7.1.27 on the Login Form allows an unauthenticated remote attacker to perform multiple login attempts, which facilitates gaini

Q: How urgent is CVE-2021-42544?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2021-42544 is a high-severity flaw (CVSS 7.5) affecting topease. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Missing Rate Limiting in Web Applications operating on Business-DNA Solutions GmbH’s TopEase® Platform Version <= 7.1.27 on the Login Form allows an unauthenticated remote attacker to perform multiple login attempts, which facilitates gaining privileges.

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	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-307
Published	2021-11-30
Last modified	2026-06-17

Publisher (CNA): Switzerland Government Common Vulnerability Program · Vendor: businessdnasolutions

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

Am I affected?

Timeline

2021-11-30 12:15 UTCPublished CVE record published
2026-06-17 04:09 UTCUpdated Record last modified

businessdnasolutions topease UPGRADE

Affected: <= 7.1.27

Fixed in: newer than 7.1.27

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 7.1.27 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade topease

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-2021-42544?

topease: upgrade to newer than 7.1.27. Exact commands for each OS are on this page.

Is CVE-2021-42544 being exploited?

CVE-2021-42544 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-2021-42544 affect?

CVE-2021-42544 affects topease. Severity is high (CVSS 7.5). Missing Rate Limiting in Web Applications operating on Business-DNA Solutions GmbH’s TopEase® Platform Version <= 7.1.27 on the Login Form allows an unauthenticated remote attacker to perform multiple login attempts, which facilitates gaini

How urgent is CVE-2021-42544?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-42545 HIGH 8.1 UPGRADE An insufficient session expiration vulnerability exists in Business-DNA Solutions GmbH’s TopEase® Platform Ver
CVE-2021-42123 HIGH 7.3 UPGRADE Unrestricted File Upload in Web Applications operating on Business-DNA Solutions GmbH’s TopEase® Platform Vers
CVE-2021-42122 MEDIUM 4.3 UPGRADE Insufficient Input Validation in Web Applications operating on Business-DNA Solutions GmbH’s TopEase® Platform
CVE-2021-42121 MEDIUM 4.3 UPGRADE Insufficient Input Validation in Web Applications operating on Business-DNA Solutions GmbH’s TopEase® Platform
CVE-2021-42120 MEDIUM 6.5 UPGRADE Insufficient Input Validation in Web Applications operating on Business-DNA Solutions GmbH’s TopEase® Platform

References

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