CVE-2025-63704
query-parser-string is vulnerable to Prototype Pollution
9.8
CRITICAL
CVSS 3.1
EPSS 0.02%
Description
NPM package query-parser-string 1.0.0 is vulnerable to Prototype Pollution. The package does not properly sanitize user supplied query parameters and merges them to the newly created object.
How to fix CVE-2025-63704
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- npm/query-string-parser—no fix listed
Is CVE-2025-63704 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |