{"schemaVersion":3,"id":"CVE-2021-42648","aliases":["CGA-572x-2w4h-cwg4","CGA-9f96-wg62-vhh5","CGA-hgjx-qpmc-h7cp","CGA-jqp6-xghm-vfjq","GHSA-2gp3-6c9p-jp7w"],"status":"published","duplicateOf":null,"title":null,"description":"Cross-site scripting (XSS) vulnerability exists in Coder Code-Server before 3.12.0, allows attackers to execute arbitrary code via crafted URL.","dates":{"published":"2022-05-11T17:34:38.000Z","modified":"2024-08-04T03:38:49.525Z","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 · Wolfi","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":"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":"OSV · Chainguard","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":0.00869,"percentile":0.58079,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.05599999999999997,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00813},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00869,"percentile":0.58079}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00813,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00869,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00869,"percentile":0.58079}]},"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":"GITHUB_CDR_CODE-SERVER","name":"Code Server","source":"github","url":"https://github.com/cdr/code-server/issues/4355","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","description":"The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/79.html"}],"affected":[{"vendor":"chainguard","product":"code-server","name":"code-server","label":"code-server","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/code-server","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"code-server-compat","name":"code-server-compat","label":"code-server-compat","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/code-server-compat","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"wolfi","product":"code-server","name":"code-server","label":"code-server","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/code-server","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"wolfi","product":"code-server-compat","name":"code-server-compat","label":"code-server-compat","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/code-server-compat","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"coder","product":"code-server","name":"code-server","label":"code-server","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.12.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.12.0","eol":null,"hubHref":"/vendor/coder/code-server"},{"vendor":"Npm","product":"code-server","name":"code-server","label":"code-server","ecosystem":"Npm","cpePart":null,"purl":"pkg:npm/code-server","purlType":"npm","versions":[{"text":"< 3.12.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.12.0","eol":null,"hubHref":null}],"affectedCount":6,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/cdr/code-server/issues/4355","label":"github.com/cdr/code-server/issues/4355","hostname":"github.com","tags":["X Refsource MISC","FIX","WEB","Exploit","Issue Tracking","Patch","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42648","label":"nvd.nist.gov/vuln/detail/CVE-2021-42648","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/coder/code-server/pull/4430","label":"github.com/coder/code-server/pull/4430","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/coder/code-server","label":"github.com/coder/code-server","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CGA-7RQ7-F66G-9VW8"]},"timeline":[{"kind":"published","date":"2022-05-11T17:34:38.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T03:38:49.525Z","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":"2026-10-19T22:24:04.346Z","stale":false,"partial":false}}