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CVE-2021-47837

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Date: January 16, 2026

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.

Severity Score

Related Resources (6)

https://github.com/amitmerchant1990/electron-markdownify
https://imgur.com/a/T4jBoiS
https://www.exploit-db.com/exploits/49835
https://www.vulncheck.com/advisories/markdownify-persistent-cross-site-scripting
https://nvd.nist.gov/vuln/detail/CVE-2021-47837
https://www.mend.io/vulnerability-database/CVE-2021-47837

Severity Score

Weakness Type (CWE)

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

CWE-79

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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