CVE-2021-47837 MEDIUM

CVE-2021-47837: Markdownify 1.2.0 - Persistent Cross-Site Scripting

Vendor Amitmerchant1990
Product Markdownify
Weakness CWE-79 · XSS
Published January 16, 2026
Last update March 5, 2026

CVSS base score

5.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 16, 2026 CVE published
March 5, 2026 Record updated