CVE-2023-37899feathersjs socket handler allows abusing implicit toString
- 7.5HighCVSS base score
- 1.2%Exploitation in 30 daysEPSS · top 32% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: a proof of concept is public.
Timeline
ID reserved
By GitHub_M
- 9 days later
· 9 days later
Published
- 16 months later
· 16 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.2% · top 32% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected < 4.5.18
- affected >= 5.0.0, < 5.0.8
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npm@feathersjs/socketioGHSA-hhr9-rh25-hvf9 (opens in a new tab)
- npm@feathersjs/transport-commonsGHSA-hhr9-rh25-hvf9 (opens in a new tab)
References
References5
- https://github.com/feathersjs/feathers/security/advisories/GHSA-hhr9-rh25-hvf9 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/feathersjs/feathers/pull/3241 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/feathersjs/feathers/pull/3242 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/feathersjs/feathers/blob/crow/CHANGELOG.md#4518-2023-07-19 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/feathersjs/feathers/blob/dove/CHANGELOG.md#508-2023-07-19 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2023-2077 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-hhr9-rh25-hvf9 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2023-37899)Record last updated .