{"schemaVersion":3,"id":"CVE-2021-27907","aliases":["GHSA-w358-rj93-r5qv","BIT-superset-2021-27907","PYSEC-2021-127"],"status":"published","duplicateOf":null,"title":null,"description":"Apache Superset up to and including 0.38.0 allowed the creation of a Markdown component on a Dashboard page for describing chart's related information. Abusing this functionality, a malicious user could inject javascript code executing unwanted action in the context of the user's browser. The javascript code will be automatically executed (Stored XSS) when a legitimate user surfs on the dashboard page. The vulnerability is exploitable creating a “div” section and embedding in it a “svg” element with javascript code.","dates":{"published":"2021-03-05T11:35:15.000Z","modified":"2025-02-13T16:27:58.281Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.4,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Pypi","score":5.4,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","exploitability":5.9,"impact":4.5,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.4,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/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":3.5,"severity":"low","vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.86393,"percentile":0.99735,"severity":"critical","asOf":"2026-10-18T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-18T00:00:00.000Z","baselineScore":0.86393},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.86393,"percentile":0.99735}],"last30":[{"date":"2026-09-18T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.86393,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.86393,"percentile":0.99735}]},"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":[],"exploitCount":0,"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":"apache software foundation","product":"apache superset","name":"Apache Superset","label":"apache superset","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ Apache Superset, ≤ 0.38.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ Apache Superset, ≤ 0.38.0","eol":null,"hubHref":"/vendor/apache_software_foundation/apache_superset"},{"vendor":"apache","product":"superset","name":"Superset","label":"superset","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 0.38.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 0.38.0","eol":null,"hubHref":"/vendor/apache/superset"},{"vendor":"PyPI","product":"apache-superset","name":"apache-superset","label":"apache-superset","ecosystem":"PyPI","cpePart":null,"purl":"pkg:pypi/apache-superset","purlType":"pypi","versions":[{"text":"< 0.38.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.38.1","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://lists.apache.org/thread.html/r09293fb09f1d617f0d2180c42210e739e2211f8da9bc5c1873bea67a%40%3Cdev.superset.apache.org%3E","label":"lists.apache.org/thread.html/…","hostname":"lists.apache.org","tags":["X Refsource MISC","WEB","Mailing List","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27907","label":"nvd.nist.gov/vuln/detail/CVE-2021-27907","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/advisories/GHSA-w358-rj93-r5qv","label":"github.com/advisories/GHSA-w358-rj93-r5qv","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/apache/superset","label":"github.com/apache/superset","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/apache-superset/PYSEC-2021-127.yaml","label":"github.com/pypa/advisory-database/tree/main/vulns/apache-superset/PYSEC-2021-127.yaml","hostname":"github.com","tags":["WEB"]},{"url":"https://lists.apache.org/thread.html/r09293fb09f1d617f0d2180c42210e739e2211f8da9bc5c1873bea67a@%3Cdev.superset.apache.org%3E","label":"lists.apache.org/thread.html/…","hostname":"lists.apache.org","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-03-05T11:35:15.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-02-13T16:27:58.281Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":39,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T13:29:49.751Z","stale":false,"partial":false}}