CVE-2021-47839

HIGH 7.2

Marky 0.0.1 - Persistent Cross-Site Scripting

CVSS Score

7.2

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	vesparny
Product	marky
Published	Jan 16, 2026
Last Updated	Mar 5, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

vesparny / Marky

0.0.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/49831 github.com: https://github.com/vesparny/marky imgur.com: https://imgur.com/a/qclfrUx vulncheck.com: https://www.vulncheck.com/advisories/marky-persistent-cross-site-scripting

Credits

TaurusOmar