CVE-2025-57330
CVE-2025-57330 is a high-severity vulnerability in Web3js Web3-core-subscriptions with a CVSS 3.x base score of 7.5. 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 7.5)
- EPSS exploit prediction: 0% (29th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-31064
- Weakness: CWE-1321
- Affected product: Web3js Web3-core-subscriptions
- Published:
- Last modified:
Description
The web3-core-subscriptions is a package designed to manages web3 subscriptions. A Prototype Pollution vulnerability in the attachToObject function of web3-core-subscriptions version 1.10.4 and before allows attackers to inject properties on Object.prototype via supplying a crafted payload, causing denial of service (DoS) as the minimum consequence.
Frequently asked questions
- What is CVE-2025-57330?
- The web3-core-subscriptions is a package designed to manages web3 subscriptions. A Prototype Pollution vulnerability in the attachToObject function of web3-core-subscriptions version 1.10.4 and before allows attackers to inject properties on Object.prototype via supplying a crafted payload, causing denial of service (DoS) as the minimum consequence.
- How severe is CVE-2025-57330?
- CVE-2025-57330 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2025-57330 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-57330?
- CVE-2025-57330 affects Web3js Web3-core-subscriptions. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-57330?
- 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-2025-57330 have an EU (EUVD) identifier?
- Yes. CVE-2025-57330 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31064.
- When was CVE-2025-57330 published?
- CVE-2025-57330 was published on 2025-09-24 and last updated on 2026-06-17.
References
- https://github.com/VulnSageAgent/PoCs/blob/main/JavaScript/prototype-pollution/web3-core-subscriptions%401.10.4/index.js
- https://github.com/VulnSageAgent/PoCs/tree/main/JavaScript/prototype-pollution/CVE-2025-57330
Affected products (1)
- cpe:2.3:a:web3js:web3-core-subscriptions:*:*:*:*:*:node.js:*:*
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