MEDIUM
simple-markdown.js in Khan Academy simple-markdown before 0.4.4 allows XSS via a data: or vbscript: URI
Published Mar 15, 2019
6.1
MEDIUMCVSS 3.0
EPSS 1.27%
Description
simple-markdown.js in Khan Academy simple-markdown before 0.4.4 allows XSS via a data: or vbscript: URI.
Affected products
No data.
Configuration 1
- < 0.4.4
Configuration 2
- 30
No data.
No Red Hat product state for this CVE.
simple-markdown
npm
Introduced 0 Fixed 0.4.4
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | simple-markdown | 0 | 0.4.4 |
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
6.1 MEDIUM NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Impact Low
Integrity Impact Low
Availability Impact None
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.27% 0.01274
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01274
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.27% (0.01274) | 68.85th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.27% (0.01274) | 66.00th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.35% (0.00349) | 55.18th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.15% (0.00148) | 52.25th | v3 (v2023.03.01) |
| Mar 8, 2024 | 0.15% (0.00148) | 49.85th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.18% (0.00184) | 55.46th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.13% (0.00129) | 45.96th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.13% (0.04134) | 68.25th | v2 (v2022.01.01) |
| Feb 3, 2022 | 5.36% (0.05363) | 79.74th | v1 |
| Jan 6, 2022 | 5.36% (0.05363) | 79.54th | v1 |
| Jan 5, 2022 | 1.25% (0.01247) | 69.74th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.25% (0.01247) | 0.00th | v1 |
Weaknesses (1)
References (11)
- https://github.com/Khan/simple-markdown/pull/63 x_refsource_MISCThird Party Advisory
- https://github.com/advisories/GHSA-qj3f-9gmq-fwv5 Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JFLP3KJVSV5VWMNEBRXLGRVYFXOV5KOG/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KZG2I7VH7WLSEUQ77KYP5CRAVFT2RK2U/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O5EFW655O3BXZYAPB65XEREXB2DSNSOT/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JFLP3KJVSV5VWMNEBRXLGRVYFXOV5KOG/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KZG2I7VH7WLSEUQ77KYP5CRAVFT2RK2U/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/O5EFW655O3BXZYAPB65XEREXB2DSNSOT/
- https://nvd.nist.gov/vuln/detail/CVE-2019-9844
- https://www.npmjs.com/advisories/815
- https://www.npmjs.com/package/simple-markdown/v/0.4.4 x_refsource_MISCThird Party Advisory
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Mar 15, 2019
Updated Aug 4, 2024
Reserved Mar 15, 2019
Link CVE-2019-9844
CISA Vulnrichment
GHSA-QJ3F-9GMQ-FWV5 Updated n/a