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CVE-2021-47837 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

Markdownify 1.2.0 contains a persistent cross-site scripting vulnerability that allows attackers to store malicious payloads within markdown files. Attackers can upload crafted markdown files with embedded scripts that execute when the file is opened, potentially enabling remote code execution.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:8.6 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CNA: [email protected]CVSS-B:7.2 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://www.vulncheck.com/advisories/markdownify-persistent-cross-site-scripting	CISA-ADP	AdvisoryExploit
https://github.com/amitmerchant1990/electron-markdownify	[email protected]	ProductSource CodeVendor
https://imgur.com/a/T4jBoiS	[email protected]	Broken Link
https://www.exploit-db.com/exploits/49835	[email protected]	Exploit
https://www.vulncheck.com/advisories/markdownify-persistent-cross-site-scripting	[email protected]	AdvisoryExploit

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

Product	Versions
Markdownify	1.2.0 (semver)
CPE cpe:2.3:a:markdownify_project:markdownify:::::::: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Jan 16, 2026	CVE Modified	CISA-ADP
Jan 16, 2026	New CVE Received	[email protected]