Feed/CVE-2021-34436
CVE-2021-34436CRITICALCVSS 9.8

CVE-2021-34436

Published Sep 2, 2021·Updated Jun 16, 2026

NVD 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.

CVSS Vector

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

References

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