PT-2026-3294 · Marky · Marky

Taurusomar · CVE-2021-47839 · Published 2026-01-16 · Updated 2026-06-30

Positive Technologies (AI Summary)

CVSS v3.1

7.2

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Marky version 0.0.1

Description Marky version 0.0.1 contains a persistent cross-site scripting issue. Attackers can upload crafted markdown files with embedded JavaScript payloads. When these files are opened, the embedded scripts execute, potentially enabling remote code execution. The issue allows attackers to inject malicious scripts into markdown files.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

RCE

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-47839

Affected Products

Marky

References · 11

• 🔥 https://imgur.com/a/qclfrUx · Exploit
• 🔥 https://vulncheck.com/advisories/marky-persistent-cross-site-scripting · Exploit
• 🔥 https://exploit-db.com/exploits/49831 · Exploit
• https://osv.dev/vulnerability/CVE-2021-47839 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47839 · Security Note
• https://github.com/vesparny/marky · Note
• https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47839.json · Note
• https://t.me/cveNotify/179519 · Telegram Post
• https://twitter.com/CVEnew/status/2012303205703761982 · Twitter Post
• https://bugzilla.redhat.com/show_bug.cgi?id=2430451 · Note
• https://access.redhat.com/security/cve/CVE-2021-47839 · Note