{"id":"CVE-2021-41038","aliases":["GHSA-w6v7-w58j-pg5r"],"url":"https://o3.security/vulnerability/CVE-2021-41038","summary":"Improper Verification of Communication Channel in @theia/plugin-ext","details":"In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().","published":"2021-11-10T17:15:11.170Z","modified":"2026-08-07T17:02:44.558518Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":{"score":0.00713,"percentile":0.50575,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"npm","name":"@theia/plugin-ext","fixedVersion":"1.18.0"}],"fix":{"url":"https://github.com/eclipse-theia/theia/pull/10125","label":"eclipse-theia/theia#10125"},"references":[{"type":"REPORT","url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=575924"},{"type":"FIX","url":"https://github.com/eclipse-theia/theia/pull/10125"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T17:02:44.558518Z"}}