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CRITICAL

CVE-2021-25945

CVSS v3

9.8

CRITICAL

EPSS Score

3.0 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • js-extendnpmall versions · no fixed version listed

Vendor advisories

  • CVE-2021-25945 Red Hat Product Security

    js-extend: prototype pollution allows attacker to cause a denial of service and may lead to remote code execution

Full record on NVD

Description

Prototype pollution vulnerability in 'js-extend' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.

Technical details

Published
2021-05-26

Frequently asked questions

What is CVE-2021-25945?

Prototype pollution vulnerability in 'js-extend' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.

Is CVE-2021-25945 actively exploited?

Active exploitation of CVE-2021-25945 has not been confirmed. Its EPSS score was 3.0% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-25945?

CVE-2021-25945 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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