What is CVE-2021-47840?

CVE-2021-47840 is a high-severity vulnerability in Moeditor, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-01-16.

How severe is CVE-2021-47840?

High severity. CVSS v3 base score is 7.2 out of 10.

XSS in Moeditor

CVE-2021-47840

Moeditor 0.2.0 contains a persistent cross-site scripting vulnerability that allows attackers to store malicious payloads within markdown files. Attackers can upload specially crafted markdown files with embedded JavaScript that execute wh…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (32.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Moeditor — versions 0.2.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2021-47840?: CVE-2021-47840 is a high-severity vulnerability in Moeditor, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-01-16.
How severe is CVE-2021-47840?: High severity. CVSS v3 base score is 7.2 out of 10.