Is CVE-2021-28162 actively exploited?

No active exploitation of CVE-2021-28162 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-28162 be exploited remotely?

Yes. CVE-2021-28162 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-28162?

CVE-2021-28162 has a CVSS score of 6.1 (MEDIUM).

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MEDIUM

CVE-2021-28162

CWE-830Published: March 12, 2021· Updated: Jun 17, 2026

6.1

CVSS v3.1

Official Description

In Eclipse Theia versions up to and including 0.16.0, in the notification messages there is no HTML escaping, so Javascript code can run.

NVD Source

Technical Analysis

CVE-2021-28162 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

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.