What is CVE-2021-30074?

CVE-2021-30074 is a medium-severity vulnerability in Docsifyjs Docsify, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-04-02.

How severe is CVE-2021-30074?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Docsifyjs Docsify

CVE-2021-30074

docsify 4.12.1 is affected by Cross Site Scripting (XSS) because the search component does not appropriately encode Code Blocks and mishandles the " character.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-04-02 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.008 (54.5th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Docsifyjs Docsify — versions 4.12.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/docsifyjs/docsify/issues/1549 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-30074?: CVE-2021-30074 is a medium-severity vulnerability in Docsifyjs Docsify, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-04-02.
How severe is CVE-2021-30074?: Medium severity. CVSS v3 base score is 6.1 out of 10.