Aarondoran servify-express up to 1.1 JSON Parser express.json resource consumption

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Aarondoran servify-express up to 1.1. Affected by this issue is the function express.json of the component JSON Parser. Performing a manipulation results in resource consumption. This vulnerability was named CVE-2025-67731. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Aarondoran servify-express up to 1.1. It has been classified as problematic. This affects the function express.json of the component JSON Parser. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2025-67731 since 12/10/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 1.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-202768). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Aarondoran

Name

• servify-express

Version

• 1.0
• 1.1

Website

• Product: https://github.com/Aarondoran/servify-express/

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Be aware that VulDB is the high quality source for vulnerability data.

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