What is the CVSS score of CVE-2025-57330?

CVE-2025-57330 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of Prototype Pollution are affected by CVE-2025-57330?

Organizations using the attachToObject function of web3-core-subscriptions face notable risk from CVE-2025-57330, a prototype pollution vulnerability rated CVSS 7.5.

Is there a public PoC exploit available for CVE-2025-57330?

Yes, a public proof-of-concept exploit is available for CVE-2025-57330. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-57330?

Within 7 days: Identify all affected systems running the attachToObject function of web3-core-subscriptions and apply vendor patches promptly. Monitor vendor channels for patch availability.

Prototype Pollution CVE-2025-57330

HIGH

Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) (CWE-1321)

2025-09-24 cve@mitre.org

Denial Of Service Prototype Pollution Web3 Core Subscriptions

7.5

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:14 vuln.today

PoC Detected

Oct 17, 2025 - 14:54 vuln.today

Public exploit code

CVE Published

Sep 24, 2025 - 19:15 nvd

HIGH 7.5

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

111 npm packages depend on web3-core-subscriptions (13 direct, 98 indirect)

Ecosystem-wide dependent count for version 2.0.0-alpha.1.

DescriptionNVD

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.

AnalysisAI

The web3-core-subscriptions is a package designed to manages web3 subscriptions. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) (CWE-1321), which allows attackers to modify object prototypes to inject properties affecting application logic. 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. Affected products include: Web3Js Web3-Core-Subscriptions. Version information: version 1.10.4.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Freeze prototypes, validate object keys, avoid recursive merging of untrusted data.

CVE-2025-57330 vulnerability details – vuln.today

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Prototype Pollution CVE-2025-57330

CVSS VectorNVD

Lifecycle Timeline

Blast Radius

DescriptionNVD

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code