CVE-2021-23484: The package zip-local before 0.3.5 are vulnerable to Arbitrary File Write via Archive Extraction (Zip Slip) wh

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CRITICAL 9.8REMOTEUPGRADE

CVE-2021-23484 is a critical-severity flaw (CVSS 9.8) affecting zip-local. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The package zip-local before 0.3.5 are vulnerable to Arbitrary File Write via Archive Extraction (Zip Slip) which can lead to an extraction of a crafted file outside the intended extraction directory.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 19%)
CISA exploited list	No
Weakness	CWE-22
Published	2022-01-28
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: zip-local project

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

Am I affected?

Timeline

2022-01-28 22:15 UTCPublished CVE record published
2026-06-17 03:38 UTCUpdated Record last modified

zip-local project zip-local UPGRADE

Affected: < 0.3.5

Fixed in: 0.3.5

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls zip-local

2. UPGRADE to 0.3.5

npm install zip-local@">=0.3.5"

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-2021-23484?

zip-local: upgrade to 0.3.5. Exact commands for each OS are on this page.

Is CVE-2021-23484 being exploited?

CVE-2021-23484 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-2021-23484 affect?

CVE-2021-23484 affects zip-local. Severity is critical (CVSS 9.8). The package zip-local before 0.3.5 are vulnerable to Arbitrary File Write via Archive Extraction (Zip Slip) which can lead to an extraction of a crafted file outside the intended extraction directory.

How urgent is CVE-2021-23484?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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