XSS in Jersou Markdown Explorer
CVE-2021-47836
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.003 (24.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Jersou Markdown Explorer — versions 0.1.1
Weakness classification (CWE)
References
- disclosure@vulncheck.com (exploit)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (exploit)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47836?
- CVE-2021-47836 is a medium-severity vulnerability in Jersou Markdown Explorer, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-01-16.
- How severe is CVE-2021-47836?
- Medium severity. CVSS v3 base score is 6.1 out of 10.