{"cve":"CVE-2019-9844","nvd":{"published":"2019-04-09T02:29:02.163","modified":"2026-06-17T02:44:42.370","status":"Modified","description":"simple-markdown.js in Khan Academy simple-markdown before 0.4.4 allows XSS via a data: or vbscript: URI.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://github.com/Khan/simple-markdown/pull/63","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JFLP3KJVSV5VWMNEBRXLGRVYFXOV5KOG/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KZG2I7VH7WLSEUQ77KYP5CRAVFT2RK2U/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O5EFW655O3BXZYAPB65XEREXB2DSNSOT/","https://www.npmjs.com/package/simple-markdown/v/0.4.4"],"products":["fedoraproject:fedora","khanacademy:simple-markdown"],"source":"nvd","synced_at":"2026-10-19T20:55:22.313337056+00:00"},"epss":{"cve":"CVE-2019-9844","score":0.01274,"percentile":0.69912,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-qj3f-9gmq-fwv5","url":"https://osv.dev/vulnerability/GHSA-qj3f-9gmq-fwv5","summary":"Cross-Site Scripting in simple-markdown","modified":"2023-11-08T04:01:48.013439Z","packages":[{"ecosystem":"npm","name":"simple-markdown","purl":"pkg:npm/simple-markdown","ranges":["<0.4.4"],"fixed":["0.4.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}