{"id":"CVE-2021-27907","aliases":["BIT-superset-2021-27907","GHSA-w358-rj93-r5qv","PYSEC-2021-127"],"url":"https://o3.security/vulnerability/CVE-2021-27907","summary":"Apache Superset Stored XSS on Dashboard markdown","details":"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.","published":"2021-03-05T12:15:12.160Z","modified":"2026-07-09T01:06:34.668166Z","cvss":{"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"},"epss":{"score":0.86393,"percentile":0.99728,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"apache-superset","fixedVersion":"0.38.1"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://lists.apache.org/thread.html/r09293fb09f1d617f0d2180c42210e739e2211f8da9bc5c1873bea67a%40%3Cdev.superset.apache.org%3E"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27907"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-w358-rj93-r5qv"},{"type":"PACKAGE","url":"https://github.com/apache/superset"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/apache-superset/PYSEC-2021-127.yaml"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r09293fb09f1d617f0d2180c42210e739e2211f8da9bc5c1873bea67a@%3Cdev.superset.apache.org%3E"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T01:06:34.668166Z"}}