Is CVE-2021-42117 actively exploited?

No active exploitation of CVE-2021-42117 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-42117 be exploited remotely?

Yes. CVE-2021-42117 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-42117?

CVE-2021-42117 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2021-42117

CWE-20Published: November 30, 2021· Updated: Jun 17, 2026

5.4

CVSS v3.1

Official Description

Insufficient Input Validation in Web Applications operating on Business-DNA Solutions GmbH’s TopEase® Platform Version <= 7.1.27 allows an authenticated remote attacker with Object Modification privileges to insert arbitrary HTML without code execution.

NVD Source

Technical Analysis

CVE-2021-42117 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.