High severity7.2NVD Advisory· Published Jan 16, 2026· Updated Jul 15, 2026

CVE-2021-47839

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Vesparny/Markyreferences2 versions
(expand)+ 1 more
- (no CPE)
- (no CPE)range: <0.0.1

Patches

Vulnerability mechanics

References

access.redhat.com/security/cve/CVE-2021-47839nvd
bugzilla.redhat.com/show_bug.cginvd
imgur.com/a/qclfrUxnvd
security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47839.jsonnvd
www.exploit-db.com/exploits/49831nvd
www.vulncheck.com/advisories/marky-persistent-cross-site-scriptingnvd

News mentions

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cvss	0.468
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000