What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-16 · updated 2026-06-17
• Weakness: CWE-79

Description

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: 1.2.0

References

• https://github.com/amitmerchant1990/electron-markdownify
• https://imgur.com/a/T4jBoiS
• https://www.exploit-db.com/exploits/49835
• https://www.vulncheck.com/advisories/markdownify-persistent-cross-site-scripting
• https://www.vulncheck.com/advisories/markdownify-persistent-cross-site-scripting

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