CVE-2021-28161

Name: CVE-2021-28161
Creator: NVD / NIST
Published: 2021-03-12T22:15:15.077+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.71%

Last modified Jun 17, 2026

CVE-2021-28161 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. In Eclipse Theia versions up to and including 1.8.0, in the debug console there is no HTML escaping, so arbitrary Javascript code can be injected.. EPSS estimates a 0.71% chance of exploitation in the next 30 days.

Description

In Eclipse Theia versions up to and including 1.8.0, in the debug console there is no HTML escaping, so arbitrary Javascript code can be injected.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.71%

48.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Eclipse	Theia	<= 1.8.0

References

https://github.com/eclipse-theia/theia/issues/8794Exploit, Issue Tracking, Third Party Advisory
https://github.com/eclipse-theia/theia/issues/8794Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Mar 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28161?

In Eclipse Theia versions up to and including 1.8.0, in the debug console there is no HTML escaping, so arbitrary Javascript code can be injected.

How severe is CVE-2021-28161?

CVE-2021-28161 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.71% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28161?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-28161?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST