What’s Vulnerable › Vulnerabilities

CVE-2021-47836: Markdown Explorer 0.1.1 - Persistent Cross-Site Scripting

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% 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

Markdown Explorer 0.1.1 contains a cross-site scripting vulnerability that allows attackers to inject malicious code through file uploads and editor inputs. Attackers can upload markdown files with embedded JavaScript payloads that execute in the application's privileged renderer context, allowing code execution on the host.

Affected products

• jersou Markdown Explorer: 0.1.1

References

• https://github.com/jersou/markdown-explorer
• https://imgur.com/a/w4bcPWs
• https://www.exploit-db.com/exploits/49826
• https://www.vulncheck.com/advisories/markdown-explorer-persistent-cross-site-scripting
• https://www.vulncheck.com/advisories/markdown-explorer-persistent-cross-site-scripting

Get alerted when CVE-2021-47836 or the next vulnerability affects your stack