CVE-2021-47837: AMITMERCHANT1990 Markdownify

High severity, CVSS 7.2. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• AMITMERCHANT1990 Markdownify: version 1.2.0 only

Published 2026-01-16. Last modified 2026-06-17.