CVE-2025-3197
CVE-2025-3197 is a high-severity vulnerability with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1321.
Key facts
- Severity: High (CVSS 3.x base score 7.3)
- CVSS v4: 5.5
- EPSS exploit prediction: 0% (31st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-9700
- Weakness: CWE-1321
- Published:
- Last modified:
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__.
Frequently asked questions
- What is 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__.
- How severe is CVE-2025-3197?
- CVE-2025-3197 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2025-3197 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-3197?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-3197 have an EU (EUVD) identifier?
- Yes. CVE-2025-3197 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9700.
- When was CVE-2025-3197 published?
- CVE-2025-3197 was published on 2025-04-04 and last updated on 2026-06-17.
References
- https://gist.github.com/miguelafmonteiro/d8f66af61d14e06338b688f90c4dfa7c
- https://github.com/jonschlinkert/expand-object/blob/master/index.js%23L13
- https://security.snyk.io/vuln/SNYK-JS-EXPANDOBJECT-5821390
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