How severe is CVE-2021-42544?

CVE-2021-42544 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-42544 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42544?

CVE-2021-42544 affects Businessdnasolutions Topease. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42544?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-42544 published?

CVE-2021-42544 was published on 2021-11-30 and last updated on 2026-06-17.

CVE-2021-42544

CVE-2021-42544 is a high-severity vulnerability in Businessdnasolutions Topease with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-307.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.5
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-307
Affected product: Businessdnasolutions Topease
Published: 2021-11-30
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-42544?: 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.
How severe is CVE-2021-42544?: CVE-2021-42544 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-42544 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42544?: CVE-2021-42544 affects Businessdnasolutions Topease. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42544?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-42544 published?: CVE-2021-42544 was published on 2021-11-30 and last updated on 2026-06-17.

References

https://confluence.topease.ch/confluence/display/DOC/Release+Notes

Affected products (1)

cpe:2.3:a:businessdnasolutions:topease:*:*:*:*:*:*:*:*

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