What is CVE-2021-42545?

CVE-2021-42545 is a high-severity vulnerability in Business-Dnasolutions Topease, classified under Insufficient Session Expiration. CVSS score: 8.1/10. Published 2021-11-30.

How severe is CVE-2021-42545?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2021-42545 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Business-Dnasolutions Topease

CVE-2021-42545

An insufficient session expiration vulnerability exists in Business-DNA Solutions GmbH’s TopEase® Platform Version <= 7.1.27, which allows a remote attacker to reuse, spoof, or steal other user and admin sessions.

Published 2021-11-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.011 (65.4th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000

Affected products

Business-Dnasolutions Topease
Business-Dna Solutions Gmbh Topease — versions unspecified

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

Public proof-of-concept exploits

References

confluence.topease.ch/confluence/display/DOC/Release+Notes (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-42545?: CVE-2021-42545 is a high-severity vulnerability in Business-Dnasolutions Topease, classified under Insufficient Session Expiration. CVSS score: 8.1/10. Published 2021-11-30.
How severe is CVE-2021-42545?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2021-42545 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.