CVE-2019-9844 : simple-markdown.js in Khan Academy simple-markdown before 0.4.4 allows XSS via a

simple-markdown.js in Khan Academy simple-markdown before 0.4.4 allows XSS via a data: or vbscript: URI.

Published 2019-04-09 02:29:02

Updated 2019-04-15 12:31:43

Source MITRE

View at NVD, CVE.org

Vulnerability category: Cross site scripting (XSS)

Products affected by CVE-2019-9844

Fedoraproject » Fedora » Version: 30
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
Matching versions
Khanacademy » Simple-markdown » For Node.js
Versions before (<) 0.4.4
cpe:2.3:a:khanacademy:simple-markdown:*:*:*:*:*:node.js:*:*
Matching versions

EPSS FAQ

0.10%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 44 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:P/A:N	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
6.1	MEDIUM	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	2.8	2.7	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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.

Assigned by: nvd@nist.gov (Primary)

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/O5EFW655O3BXZYAPB65XEREXB2DSNSOT/

[SECURITY] Fedora 29 Update: nodejs-simple-markdown-0.4.4-1.fc29 - package-announce - Fedora Mailing-Lists
https://www.npmjs.com/package/simple-markdown/v/0.4.4

simple-markdown - npm
Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JFLP3KJVSV5VWMNEBRXLGRVYFXOV5KOG/

[SECURITY] Fedora 28 Update: nodejs-simple-markdown-0.4.4-1.fc28 - package-announce - Fedora Mailing-Lists
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KZG2I7VH7WLSEUQ77KYP5CRAVFT2RK2U/

[SECURITY] Fedora 30 Update: nodejs-simple-markdown-0.4.4-1.fc30 - package-announce - Fedora Mailing-Lists
Third Party Advisory
https://github.com/Khan/simple-markdown/pull/63

Added data: and vbscript: link fix to prevent XSS vulnerability by jedixak · Pull Request #63 · Khan/simple-markdown · GitHub
Third Party Advisory

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