Is CVE-2021-42123 actively exploited?

No active exploitation of CVE-2021-42123 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-42123 be exploited remotely?

Yes. CVE-2021-42123 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-42123?

CVE-2021-42123 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2021-42123

CWE-434Published: November 30, 2021· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

Unrestricted File Upload in Web Applications operating on Business-DNA Solutions GmbH’s TopEase® Platform Version <= 7.1.27 in the File Upload Functions allows an authenticated remote attacker with Upload privileges to upload files with any file type, enabling client-side attacks.

NVD Source

Technical Analysis

CVE-2021-42123 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.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.