CVE-2023-53940: Alfonzm Codigo Markdown Editor

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

Codigo Markdown Editor 1.0.1 contains a code execution vulnerability that allows attackers to run arbitrary system commands by crafting a malicious markdown file. Attackers can embed a video source with an onerror event that executes shell commands through Node.js child_process module when the file is opened.

Affected products

• Alfonzm Codigo Markdown Editor: version 1.0.1 only

Published 2025-12-18. Last modified 2026-06-17.