XSS in Amitmerchant1990 Markdownify
CVE-2021-47837
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
- Amitmerchant1990 Markdownify — versions 1.2.0
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/49835 (exploit)
- github.com/amitmerchant1990/electron-markdownify (product)
- imgur.com/a/T4jBoiS (exploit)
- www.vulncheck.com/advisories/markdownify-persistent-cross-site-scripting (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47837?
- CVE-2021-47837 is a high-severity vulnerability in Amitmerchant1990 Markdownify, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-01-16.
- How severe is CVE-2021-47837?
- High severity. CVSS v3 base score is 7.2 out of 10.