CVE Catalog

CVE-2021-47839

HighCVSS 7.2
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.42%

34th percentile - higher than 34% of all known CVEs

Summary

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.

Risk Assessment

The risk for the organization includes user data theft, session hijacking, and potential remote code execution on workstations of users opening malicious Markdown files.

Recommendation

Immediately update Marky to the latest patched version and implement content filtering in Markdown files to block embedded JavaScript payloads.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS