CVE-2023-37899 — Feathersjs is a framework for creating web APIs and real-time applications with

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

01What is this vulnerability?

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…

02Affected products

Vendor	Product	Versions
feathersjs	feathers	< 4.5.18, >= 5.0.0, < 5.0.8

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-07-19T19:45:31.386Z
• Last modified: 2024-10-28T15:12:04.645Z

09References

• github.com — https://github.com/feathersjs/feathers/security/advisories/GHSA-hhr9-rh25-hvf9
• github.com — https://github.com/feathersjs/feathers/pull/3241
• github.com — https://github.com/feathersjs/feathers/pull/3242
• github.com — https://github.com/feathersjs/feathers/blob/crow/CHANGELOG.md#4518-2023-07-19
• github.com — https://github.com/feathersjs/feathers/blob/dove/CHANGELOG.md#508-2023-07-19