CVE-2021-30074: docsify 4.12.1 is affected by Cross Site Scripting (XSS) because the search component does not appropriately e

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MEDIUM 6.1DOWNGRADE

CVE-2021-30074 is a medium-severity flaw (CVSS 6.1) affecting docsify. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-04-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: docsifyjs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-04-02 21:15 UTCPublished CVE record published
2026-06-17 03:49 UTCUpdated Record last modified

docsifyjs docsify DOWNGRADE

Affected: 4.12.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.12.1

1. Check installed version

apt-cache policy docsify || rpm -q docsify || docsify --version

2. No fixed release: DOWNGRADE to a release before 4.12.1 (Debian / Ubuntu)

apt-cache madison docsify sudo apt install docsify=<VERSION_BEFORE_4.12.1> sudo apt-mark hold docsify

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list docsify sudo dnf downgrade docsify-<VERSION_BEFORE_4.12.1> sudo dnf versionlock add docsify

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-30074?

docsify: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-30074 being exploited?

CVE-2021-30074 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-30074 affect?

CVE-2021-30074 affects docsify. Severity is medium (CVSS 6.1). 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.

How urgent is CVE-2021-30074?

Priority 40/100. Public exploit reference

Related CVEs

CVE-2021-23342 HIGH 8.6 UPGRADE This affects the package docsify before 4.12.0
CVE-2020-7680 MEDIUM 6.1 UPGRADE docsify prior to 4.11.4 is susceptible to Cross-site Scripting (XSS)

References

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