CVE-2021-34436

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

In Eclipse Theia 0.1.1 to 0.2.0, it is possible to exploit the default build to obtain remote code execution (and XXE) via the theia-xml-extension. This extension uses lsp4xml (recently renamed to LemMinX) in order to provide language support for XML. This is installed by default.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-22CWE-611

Affected software

VendorProductVersions
The Eclipse FoundationEclipse Theia0.1.1; 0.1.2; 0.2.0-next.28bc2735; 0.2.0-next.41406d98; 0.2.0-next.a2958907

References

Timeline

Published
Sep 2, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

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CVE-2021-34436: Critical severity, CVSS 9.8 | Vulnix