CVE-2021-47836

MEDIUM 6.1

Markdown Explorer 0.1.1 - Persistent Cross-Site Scripting

CVSS Score

6.1

EPSS Score

0.0%

EPSS Percentile

4th

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.

CWE	CWE-79
Vendor	jersou
Product	markdown explorer
Published	Jan 16, 2026
Last Updated	May 25, 2026

Stay Ahead of the Next One

Get instant alerts for jersou markdown explorer

Be the first to know when new medium vulnerabilities affecting jersou markdown explorer are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

jersou / Markdown Explorer

0.1.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

TaurusOmar