simple-markdown.js in Khan Academy simple-markdown before 0.4.4 allows XSS via a data: or vbscript: URI.
Priority LOW 30CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
simple-markdown.js in Khan Academy simple-markdown before 0.4.4 allows XSS via a data: or vbscript: URI.
Why it matters now
EPSS 0.01274 70th percentileScored 2026-11-07
Fix Fixed simple-markdown (npm): 0.4.4
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | simple-markdown (npm) | before 0.4.4 | 0.4.4 | Patch available | GHSA-qj3f-9gmq-fwv5 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- simple-markdown (npm) Vendor— Affected before 0.4.4 Fixed in 0.4.4 Patch available GHSA-qj3f-9gmq-fwv5
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:khanacademy:simple-markdown:*:*:*:*:*:node.js:*:* | before 0.4.4 | Vulnerable | Khanacademy |
| cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* | 30 | Vulnerable | Fedoraproject |
- cpe:2.3:a:khanacademy:simple-markdown:*:*:*:*:*:node.js:*:* Versions before 0.4.4 Vulnerable ·Khanacademy
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* Versions 30 Vulnerable ·Fedoraproject
Remediation
- Fix · GHSA-qj3f-9gmq-fwv5 simple-markdown (npm) Fixed in 0.4.4 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2019-9844
- 2026-10-03 Alias added: GHSA-qj3f-9gmq-fwv5
References
Advisory 7
Other 5
- https://github.com/Khan/simple-markdown
- https://lists.fedoraproject.org/archives/list/[email protected]/message/JFLP3KJVSV5VWMNEBRXLGRVYFXOV5KOG
- https://lists.fedoraproject.org/archives/list/[email protected]/message/KZG2I7VH7WLSEUQ77KYP5CRAVFT2RK2U
- https://lists.fedoraproject.org/archives/list/[email protected]/message/O5EFW655O3BXZYAPB65XEREXB2DSNSOT
- https://www.npmjs.com/advisories/815
Sources
- CVE-2019-9844 · CVE Program
- CVE-2019-9844 · NVD
- FIRST EPSS
- GHSA-qj3f-9gmq-fwv5 · GitHub Advisory Database · CC BY 4.0
- CVE-2019-9844 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences