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CVE-2021-47838

HIGH

7.2

Description

Markright 1.0 contains a persistent cross-site scripting vulnerability that allows attackers to embed malicious payloads in markdown files. Attackers can upload specially crafted markdown files that execute arbitrary JavaScript when opened, potentially enabling remote code execution on the victim's system.

CVE Details

CVSS v3.1 Score7.2

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/16/2026

Last Modified1/26/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-79

References

https://github.com/dvcrn/markright(disclosure@vulncheck.com)

https://imgur.com/a/VOsgKbZ(disclosure@vulncheck.com)

https://www.exploit-db.com/exploits/49834(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/markright-persistent-cross-site-scripting(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/markright-persistent-cross-site-scripting(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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