RCE in Alfonzm Codigo Markdown Editor
CVE-2023-53940
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (8.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 8.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Alfonzm Codigo Markdown Editor — versions 1.0.1
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/51432 (exploit)
- github.com/alfonzm/codigo-app (product)
- www.vulncheck.com/advisories/codigo-markdown-editor-electron-arbitrary-code-exe… (third-party-advisory)
Frequently asked questions
- What is CVE-2023-53940?
- CVE-2023-53940 is a high-severity vulnerability in Alfonzm Codigo Markdown Editor, classified under Code Injection. CVSS score: 7.8/10. Published 2025-12-18.
- How severe is CVE-2023-53940?
- High severity. CVSS v3 base score is 7.8 out of 10.