CVE-2021-47839 MEDIUM

CVE-2021-47839: Marky 0.0.1 - Persistent Cross-Site Scripting

Vendor Vesparny
Product Marky
Weakness CWE-79 · XSS
Published January 16, 2026
Last update June 30, 2026

CVSS base score

5.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

What the vulnerability does

01Description

Marky 0.0.1 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts into markdown files. Attackers can upload crafted markdown files with embedded JavaScript payloads that execute when the file is opened, potentially enabling remote code execution.

Key dates

02Disclosure timeline

January 16, 2026 CVE published
June 30, 2026 Record updated

Related vulnerabilities

04Related CVE