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CVE-2023-37899— feathersjs socket handler allows abusing implicit toString

Quick assessment

Affected
feathersjs feathers
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Feathers是Feathers开源的一个轻量级的 Web 框架。用于使用 TypeScript 或 JavaScript 创建 API 和实时应用程序。 Feathers存在代码问题漏洞，该漏洞源于套接字处理程序没有捕获无效的字符串转换错误，这会导致NodeJS进程在发送意外消息时崩溃。

CVSS 7.5 · High EPSS 1.19% · P68

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2023-37899

Vulnerability Information
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Vulnerability Title
feathersjs socket handler allows abusing implicit toString
Source: CVE Program / CVE List V5
Vulnerability Description
Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. Feathers socket handler did not catch invalid string conversion errors like `const message = ${{ toString: '' }}` which would cause the NodeJS process to crash when sending an unexpected Socket.io message like `socket.emit('find', { toString: '' })`. A fix has been released in versions 5.0.8 and 4.5.18. Users are advised to upgrade. There is no known workaround for this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对因果或异常条件的不恰当检查
Source: CVE Program / CVE List V5
Vulnerability Title
Feathers 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Feathers是Feathers开源的一个轻量级的 Web 框架。用于使用 TypeScript 或 JavaScript 创建 API 和实时应用程序。 Feathers存在代码问题漏洞，该漏洞源于套接字处理程序没有捕获无效的字符串转换错误，这会导致NodeJS进程在发送意外消息时崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
feathersjs feathers < 4.5.18 -

II. Public POCs for CVE-2023-37899

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 4994 chars
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III. Intelligence Information for CVE-2023-37899

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Patches & Fixes for CVE-2023-37899 (2)

Vendor Advisories for CVE-2023-37899 (1)

Other References for CVE-2023-37899 (2)

IV. Related Vulnerabilities

Same product: feathers
Same vendor: feathersjs
Same weakness: CWE-754