{"id":"CVE-2021-41038","aliases":["EUVD-2021-2403","GHSA-w6v7-w58j-pg5r"],"status":"published","title":"Improper Verification of Communication Channel in @theia/plugin-ext","description":"In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00737,"percentile":0.55003,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-940"],"published":"2021-11-10T17:05:11Z","modified":"2026-10-20T10:53:55Z","fixes":[{"ecosystem":"npm","package":"@theia/plugin-ext","fixed_in":["1.18.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@theia/plugin-ext","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0"}]}]},{"source":"osv","ecosystem":"npm","package":"@theia/plugin-ext","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.18.0"}]}]}],"products":[{"vendor":"eclipse","product":"theia"},{"vendor":"the eclipse foundation","product":"@theia/plugin-ext"}],"references":[{"url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=575924","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://github.com/eclipse-theia/theia/pull/10125","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41038","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-w6v7-w58j-pg5r"},{"url":"https://github.com/eclipse-theia/theia","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-41038","description":"In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().","status":"published","published":"2021-11-10T17:05:11Z","modified":"2024-08-04T02:59:30.93Z","cwes":["CWE-940"],"updated_at":"2026-11-02T14:32:59.105382Z"}],"euvd":[{"id":"EUVD-2021-2403","description":"In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().","status":"published","published":"2021-11-10T17:05:11Z","modified":"2024-08-04T02:59:30Z","updated_at":"2026-11-03T03:24:19.692229Z"}],"ghsa":[{"id":"GHSA-w6v7-w58j-pg5r","title":"Improper Verification of Communication Channel in @theia/plugin-ext","description":"In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().","status":"published","published":"2021-11-15T17:40:51Z","modified":"2023-02-01T05:06:27Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-940"],"updated_at":"2026-11-02T14:36:39.086869Z"}],"nvd":[{"id":"CVE-2021-41038","description":"In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().","status":"published","published":"2021-11-10T17:15:11.17Z","modified":"2026-06-17T04:07:47.413Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-940"],"updated_at":"2026-11-02T14:07:00.984108Z"}],"osv":[{"id":"CVE-2021-41038","description":"In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().","status":"published","published":"2021-11-10T17:15:11.17Z","modified":"2026-10-20T10:53:55.837472076Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:21.249056Z"},{"id":"GHSA-w6v7-w58j-pg5r","title":"Improper Verification of Communication Channel in @theia/plugin-ext","description":"In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().","status":"published","published":"2021-11-15T17:40:51Z","modified":"2023-11-08T04:06:50.177225Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-940"],"updated_at":"2026-11-02T15:46:58.401149Z"}]}}