CVE-2021-21267: Schema-Inspector is an open-source tool to sanitize and validate JS objects (npm package schema-inspector)

This week

HIGH 7.5REMOTEUPGRADEMITIGATEMITIGATE

CVE-2021-21267 is a high-severity flaw (CVSS 7.5) affecting schema-inspector, e-series performance analyzer, oncommand insight. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Schema-Inspector is an open-source tool to sanitize and validate JS objects (npm package schema-inspector). In before version 2.0.0, email address validation is vulnerable to a denial-of-service attack where some input (for example `a@0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.`) will freeze the program or web browser page executing the code. This affects any current schema-inspector users using any ve

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-20, CWE-400
Published	2021-03-19
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: netapp · schema-inspector project

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

Am I affected?

Timeline

2021-03-19 21:15 UTCPublished CVE record published
2026-06-17 03:35 UTCUpdated Record last modified

schema-inspector project schema-inspector UPGRADE

Affected: < 2.0.0

Fixed in: 2.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls schema-inspector

2. UPGRADE to 2.0.0

npm install schema-inspector@">=2.0.0"

netapp e-series performance analyzer MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy e-series-performance-analyzer || rpm -q e-series-performance-analyzer || e-series-performance-analyzer --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

netapp oncommand insight MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy oncommand-insight || rpm -q oncommand-insight || oncommand-insight --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2021-21267?

schema-inspector: upgrade to 2.0.0; e-series performance analyzer: mitigate or apply the listed mitigation; oncommand insight: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-21267 being exploited?

CVE-2021-21267 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-2021-21267 affect?

CVE-2021-21267 affects schema-inspector, e-series performance analyzer, oncommand insight. Severity is high (CVSS 7.5). Schema-Inspector is an open-source tool to sanitize and validate JS objects (npm package schema-inspector). In before version 2.0.0, email address validation is vulnerable to a denial-of-service attack where some input (for example `a@0.0.0

How urgent is CVE-2021-21267?

Priority 57/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

npm packages vulnerabilities

Related CVEs

CVE-2019-10781 CRITICAL 9.8 UPGRADE In schema-inspector before 1.6.9, a maliciously crafted JavaScript object can bypass the `sanitize()` and the

References

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