{"id":"CVE-2020-27224","aliases":["GHSA-gcm9-cc3r-c6vj"],"url":"https://o3.security/vulnerability/CVE-2020-27224","summary":"Cross-site Scripting (XSS) in Eclipse Theia","details":"In Eclipse Theia versions up to and including 1.2.0, the Markdown Preview (@theia/preview), can be exploited to execute arbitrary code.","published":"2021-02-24T17:15:15.500Z","modified":"2026-08-07T14:54:02.911322Z","cvss":{"score":9.6,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"@theia/preview","fixedVersion":"1.3.0"}],"fix":null,"references":[{"type":"REPORT","url":"https://github.com/eclipse-theia/theia/issues/7954"},{"type":"EVIDENCE","url":"https://omespino.com/write-up-google-bug-bounty-xss-to-cloud-shell-instance-takeover-rce-as-root-5000-usd/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T14:54:02.911322Z"}}