Vulnerability Details CVE-2025-67731
Servify Express is a Node.js package to start an Express server and log the port it's running on. Prior to 1.2, the Express server used express.json() without a size limit, which could allow attackers to send extremely large request bodies. This can cause excessive memory usage, degraded performance, or process crashes, resulting in a Denial of Service (DoS). Any application using the JSON parser without limits and exposed to untrusted clients is affected. The issue is not a flaw in Express itself, but in configuration. This issue is fixed in version 1.2. To work around, consider adding a limit option to the JSON parser, rate limiting at the application or reverse-proxy level, rejecting unusually large requests before parsing, or using a reverse proxy (such as NGINX) to enforce maximum request body sizes.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 39.8%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2025-67731
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cpe:2.3:a:servify-express.js:servify_express:*