CVE-2021-47839

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.

Affected Software

Weaknesses

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://www.vulncheck.com/advisories/marky-persistent-cross-site-scripting

marky: Marky: Remote Code Execution via persistent cross-site scripting

Additional References

• https://access.redhat.com/security/cve/CVE-2021-47839
• https://bugzilla.redhat.com/show_bug.cgi?id=2430451
• https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47839.json

References

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

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