{"id":"CVE-2021-34436","details":"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.","modified":"2026-08-07T17:02:20.460967Z","published":"2021-09-02T21:15:07.977Z","references":[{"type":"ADVISORY","url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=563174"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/eclipse-theia/theia","events":[{"introduced":"515e23db9dc9fb856bffae313a09d3fbae336328"},{"last_affected":"d0bde3f6e1810069dff7f04e32401420fa7665fe"}],"database_specific":{"extracted_events":[{"introduced":"0.1.1"},{"last_affected":"0.2.0"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:eclipse:theia:*:*:*:*:*:*:*:*"}}],"versions":["v0.2.0","v0.1.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-34436.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}