XSS in Eclipse Theia

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.007 (48.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Eclipse Theia
The Eclipse Foundation Theia — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

emo@eclipse.org (x_refsource_CONFIRM, Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-28161?: CVE-2021-28161 is a medium-severity vulnerability in Eclipse Theia, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-03-12.
How severe is CVE-2021-28161?: Medium severity. CVSS v3 base score is 6.1 out of 10.