Track vulnerabilities like this one. Sign up free to get alerted when software you use is affected.

CVE-2022-23631: Outdated superjson versions allow malicious code to run on servers

CVE-2022-23631 · published 4 years ago

Summary

Using outdated versions of superjson (prior to 1.8.1) on your server could allow an attacker to run arbitrary code on your system without needing a password. This is a serious issue because it could lead to unauthorized access to your server. To fix this, update to the latest version of superjson (1.8.1) as soon as possible.

What to do

Update skn0tt superjson to version 1.8.1.
Update siddhsuresh blitz to version 0.45.3.
Update blitzjs blitz to version 0.45.3 or later.
Update blitzjs superjson to version 1.8.1 or later.

Affected software

Ecosystem	Vendor	Product	Affected versions
npm	skn0tt	superjson	< 1.8.1 Fix: upgrade to 1.8.1
npm	siddhsuresh	blitz	< 0.45.3 Fix: upgrade to 0.45.3
–	blitzjs	blitz	< 0.45.3 `cpe:2.3:a:blitzjs:blitz::::::node.js::*`
–	blitzjs	superjson	< 1.8.1 `cpe:2.3:a:blitzjs:superjson::::::node.js::*`

Original advisory text

Prototype Pollution leading to Remote Code Execution in superjson

superjson is a program to allow JavaScript expressions to be serialized to a superset of JSON. In versions prior to 1.8.1 superjson allows input to run arbitrary code on any server using superjson input without prior authentication or knowledge. The only requirement is that the server implements at least one endpoint which uses superjson during request processing. This has been patched in superjson 1.8.1. Users are advised to update. There are no known workarounds for this issue.

References

https://github.com/advisories/GHSA-5888-ffcr-r425 Vendor Advisory
https://github.com/blitz-js/superjson/security/advisories/GHSA-5888-ffcr-r425 Vendor Advisory
https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/23xxx/CVE-2022-23631... Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2022-23631 Vendor Advisory
https://www.sonarsource.com/blog/blitzjs-prototype-pollution/ Third Party Advisory

Fix within

Internet-facing 3 days

Internal 60 days

Not known to be exploited
Can be exploited automatically (estimated)
Gives an attacker full control (estimated)

Severity

9.0 Critical

Exploitation

3% chance of attack within 30 days

Type

CWE-94Code Injection

CWE-1321Prototype Pollution

Timeline

Published9 Feb 2022

Updated3 Nov 2026

First seen6 Mar 2026

Sources

GHSA-5888-ffcr-r425 · GHSA

CVE-2022-23631 · NVD

CVE-2022-23631 · OSV

Track software like this

Free during beta