Overview
The Prototype Pollution vulnerability CVE-2025-57329 is a significant issue that affects the web3-core-method package. This package, designed to create methods on web3 modules, is susceptible to an attack that can result in a Denial of Service (DoS) situation or even worse. Given the widespread use of web3 modules, this vulnerability presents a substantial risk and potential disruption to any system that employs this package.
Vulnerability Summary
CVE ID: CVE-2025-57329
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
web3-core-method | <= 1.10.4 How the Exploit Works
The exploit works by an attacker injecting properties into Object.prototype via a crafted payload. This payload utilizes the attachToObject function of the web3-core-method package to modify the prototype of the targeted object. This results in a pollution of the object’s prototype. Depending on the properties injected, this can lead to a variety of consequences, from DoS to potential system compromise or data leakage.
Conceptual Example Code
The following is a conceptual example of how the vulnerability might be exploited:
let payload = JSON.parse('{"__proto__" : {"polluted" : "Prototype Polluted"}}');
web3CoreMethod.attachToObject(payload);In this example, a malicious payload is parsed and passed to the `attachToObject` method of the `web3-core-method` package. Once the payload is attached, the prototype of all objects becomes polluted with the malicious properties, leading to the potential exploitation of the system.