Cyber Resilience

CVE-2025-63704

Critical

Published: 07 May 2026

Published
07 May 2026
Modified
08 May 2026
KEV Added
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Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0048 37.6th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2025-63704 is a critical-severity Prototype Pollution (CWE-1321) vulnerability in Npmjs (inferred from references). Its CVSS base score is 9.8 (Critical).

Operationally, ranked at the 37.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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.

CWE(s)
CWE-1321

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

Npmjs
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inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References