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Cross-Site Scripting in simple-markdown

Moderate severity GitHub Reviewed Published Apr 9, 2019 to the GitHub Advisory Database • Updated Jan 9, 2023

Package

npm simple-markdown (npm)

Affected versions

< 0.4.4

Patched versions

0.4.4

Description

Versions of simple-markdown prior to 0.4.4 are vulnerable to Cross-Site Scripting. Due to insufficient input sanitization the package may render output containing malicious JavaScript. This vulnerability can be exploited through input of links containing data or VBScript URIs and a base64-encoded payload.

Recommendation

Upgrade to version 0.4.4 or later.

References

Published to the GitHub Advisory Database Apr 9, 2019
Reviewed Jun 16, 2020
Last updated Jan 9, 2023

Severity

Moderate
6.1
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weaknesses

CVE ID

CVE-2019-9844

GHSA ID

GHSA-qj3f-9gmq-fwv5

Source code

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