What is CVE-2025-3197?

CVE-2025-3197 is a high-severity vulnerability in Expand-Object, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 7.3/10. Published 2025-04-04.

How severe is CVE-2025-3197?

High severity. CVSS v3 base score is 7.3 out of 10.

Prototype Pollution in Expand-Object

CVE-2025-3197

Versions of the package expand-object from 0.0.0 are vulnerable to Prototype Pollution in the expand() function in index.js. This function expands the given string into an object and allows a nested property to be set without checking the provided keys for sensitive properties like __proto__.

Vulnerability class: Prototype Pollution

EPSS: 0.004 (31.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

N/a Expand-object — versions 0.0.0

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

Frequently asked questions

What is CVE-2025-3197?: CVE-2025-3197 is a high-severity vulnerability in Expand-Object, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 7.3/10. Published 2025-04-04.
How severe is CVE-2025-3197?: High severity. CVSS v3 base score is 7.3 out of 10.