Vulnerability · Published Apr 4, 2025 · Assigned by snyk
CVE-2025-3197
High 7.3
In plain English
A high-severity prototype pollution in expand-object. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.4%top 63.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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__.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | expand-object | no fix listed | GHSA-4vjr-hfpp-2m7w |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | expand-object | 0.0.0 – before * |
Weakness: CWE-1321 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L