{"id":87030,"date":"2026-06-03T06:15:30","date_gmt":"2026-06-03T06:15:30","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-57318-prototype-pollution-vulnerability-in-csvjson-tocsv-function","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-57318-prototype-pollution-vulnerability-in-csvjson-tocsv-function\/","title":{"rendered":"CVE-2025-57318: Prototype Pollution Vulnerability in csvjson toCsv function<\/strong>"},"content":{"rendered":"

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

The vulnerability CVE-2025-57318 is a Prototype Pollution threat in the csvjson’s toCsv function. It affects all versions up to 5.1.0. The issue is significant because it allows attackers to inject properties on Object.prototype, potentially causing denial of service (DoS) and possibly leading to system compromise or data leakage.<\/p>\n

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

CVE ID: CVE-2025-57318
\nSeverity: High (7.5 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Denial of Service, Potential system compromise, and Data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

csvjson | Up to 5.1.0<\/p>\n

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

The exploit works by taking advantage of the Prototype Pollution vulnerability in the toCsv function of csvjson. An attacker supplies a carefully crafted payload that can inject properties on Object.prototype. This injection can cause an application using the vulnerable csvjson library to behave unpredictably, leading to potential denial of service.<\/p>\n

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

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

let payload = {\n\"__proto__\": {\n\"polluted\": \"Prototype Polluted!\"\n}\n};\ncsvjson.toCsv(payload);<\/code><\/pre>\n
In this example, the payload is a JSON object that contains a “__proto__” property. When this payload is passed to the vulnerable toCsv function, it can pollute the prototype of all objects, causing unexpected behaviors in the application. This can result in a denial of service or other adverse impacts.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
To mitigate this vulnerability, apply the vendor patch as soon as it becomes available. In the interim, use Web Application Firewalls (WAF) or Intrusion Detection Systems (IDS) to detect and block attempts to exploit this vulnerability.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The vulnerability CVE-2025-57318 is a Prototype Pollution threat in the csvjson’s toCsv function. It affects all versions up to 5.1.0. The issue is significant because it allows attackers to inject properties on Object.prototype, potentially causing denial of service (DoS) and possibly leading to system compromise or data leakage. Vulnerability Summary CVE ID: CVE-2025-57318 Severity: […]<\/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-87030","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