{"id":87013,"date":"2026-04-28T10:14:37","date_gmt":"2026-04-28T10:14:37","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-57330-prototype-pollution-vulnerability-in-web3-core-subscriptions","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-57330-prototype-pollution-vulnerability-in-web3-core-subscriptions\/","title":{"rendered":"CVE-2025-57330: Prototype Pollution Vulnerability in web3-core-subscriptions<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The vulnerability CVE-2025-57330 is a Prototype Pollution issue in the web3-core-subscriptions package. This package is widely used to manage web3 subscriptions, and the vulnerability affects all versions up to 1.10.4. This issue could potentially allow an attacker to cause a Denial of Service (DoS) to the system, compromise it, or even leak sensitive data, hence the need for immediate attention and mitigation.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-57330
\nSeverity: High (7.5 CVSS)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise, data leakage, and potential for DoS<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

web3-core-subscriptions | 1.10.4 and before<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit works by an attacker injecting properties into Object.prototype via a carefully crafted payload. This payload can be delivered through network interaction with the application using the vulnerable package. The injection can modify the core behavior of the application, causing it to crash (Denial of Service) or behave unpredictably, potentially leading to system compromise or data leakage.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here is a conceptual example of a malicious payload that could exploit this vulnerability:<\/p>\n

POST \/web3\/subscribe HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{\n\"__proto__\": {\n\"shutdown\": true\n}\n}<\/code><\/pre>\n
In this example, if the server parses this JSON and merges it into their application state, it could trigger unwanted behavior like shutting down the system or service. Please note that this is a simplified example and real exploit code may be more complex and less obvious.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The vulnerability CVE-2025-57330 is a Prototype Pollution issue in the web3-core-subscriptions package. This package is widely used to manage web3 subscriptions, and the vulnerability affects all versions up to 1.10.4. This issue could potentially allow an attacker to cause a Denial of Service (DoS) to the system, compromise it, or even leak sensitive data, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-87013","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t