{"schemaVersion":3,"id":"CVE-2021-41038","aliases":["GHSA-w6v7-w58j-pg5r"],"status":"published","duplicateOf":null,"title":null,"description":"In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().","dates":{"published":"2021-11-10T17:05:11.000Z","modified":"2024-08-04T02:59:30.930Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.1,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Npm","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","exploitability":7.2,"impact":4.5,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","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","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.3,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00737,"percentile":0.5368,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00737},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00737,"percentile":0.5368}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00737,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00737,"percentile":0.5368}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_B8DA05600450FB6A","name":"Exploit Reference (bugs.eclipse.org)","source":"reference","url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=575924","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-940","name":"Improper Verification of Source of a Communication Channel","description":"The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/940.html"}],"affected":[{"vendor":"eclipse","product":"theia","name":"theia","label":"theia","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.18.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.18.0","eol":null,"hubHref":"/vendor/eclipse/theia"},{"vendor":"@theia","product":"plugin-ext","name":"@theia/plugin-ext","label":"plugin-ext","ecosystem":"Npm","cpePart":null,"purl":"pkg:npm/@theia/plugin-ext","purlType":"npm","versions":[{"text":"< 1.18.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.18.0","eol":null,"hubHref":null},{"vendor":"the eclipse foundation","product":"@theia/plugin-ext","name":"@theia/plugin-ext","label":"@theia/plugin-ext","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, < 1.18.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < 1.18.0","eol":null,"hubHref":"/vendor/the_eclipse_foundation/theiaplugin-ext"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=575924","label":"bugs.eclipse.org/bugs/show_bug.cgi?id=575924","hostname":"bugs.eclipse.org","tags":["X Refsource CONFIRM","WEB","Exploit","Issue Tracking","Third Party Advisory"]},{"url":"https://github.com/eclipse-theia/theia/pull/10125","label":"github.com/eclipse-theia/theia/pull/10125","hostname":"github.com","tags":["X Refsource CONFIRM","WEB","Patch","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41038","label":"nvd.nist.gov/vuln/detail/CVE-2021-41038","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/eclipse-theia/theia","label":"github.com/eclipse-theia/theia","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-11-10T17:05:11.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T02:59:30.930Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":35,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T17:07:13.745Z","stale":false,"partial":false}}