PT-2026-3291 · Unknown · Markdown Explorer

Taurusomar · Published 2026-01-16 · Updated 2026-01-16 · CVE-2021-47836

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Markdown Explorer version 0.1.1

Description Markdown Explorer version 0.1.1 is affected by a cross-site scripting issue. This allows attackers to inject malicious code through file uploads and editor inputs. By uploading markdown files containing JavaScript payloads, attackers can execute remote commands and potentially gain system access.

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

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-47836

Affected Products

Markdown Explorer

References · 7

• 🔥 https://vulncheck.com/advisories/markdown-explorer-persistent-cross-site-scripting · Exploit
• 🔥 https://imgur.com/a/w4bcPWs · Exploit
• 🔥 https://exploit-db.com/exploits/49826 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-47836 · Security Note
• https://osv.dev/vulnerability/CVE-2021-47836 · Vendor Advisory
• https://github.com/jersou/markdown-explorer · Note
• https://twitter.com/CVEnew/status/2012303208740438129 · Twitter Post