Medium 6.1Published Jan 16, 2026

CVE-2021-47836Markdown Explorer 0.1.1 - Persistent Cross-Site Scripting

Updated under an hour ago (Oct 27, 2026, 8:40 AM ET)

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It affects jersou Markdown Explorer. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for jersou Markdown Explorer

Exploited in the last 30 days

Markdown Explorer 0.1.1 contains a cross-site scripting vulnerability that allows attackers to inject malicious code through file uploads and editor inputs. Attackers can upload markdown files with embedded JavaScript payloads that execute in the application's privileged renderer context, allowing code execution on the host.

CVSS: 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: May 25, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

jersou Markdown Explorer jersou:markdown_explorer (from the name)	0.1.1	CNA record

References

References

https://www.exploit-db.com/exploits/49826	exploit
https://github.com/jersou/markdown-explorer	product
https://imgur.com/a/w4bcPWs	exploit
https://www.vulncheck.com/advisories/markdown-explorer-persistent-cross-site-scripting	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.