Vulnerability · Published Feb 9, 2022 · Assigned by GitHub_M

CVE-2022-23631Prototype Pollution leading to Remote Code Execution in superjson

Critical 9.1

In plain English

A critical-severity code injection in superjson from blitz-js. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.7% (higher than 86% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)2.7%top 14.1% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	blitz	0.45.3	GHSA-5888-ffcr-r425
npm	superjson	1.8.1	GHSA-5888-ffcr-r425

Affected products (as reported)

Vendor	Product	Versions
blitz-js	superjson	< 1.8.0

Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

References

https://github.com/blitz-js/superjson/security/advisories/GHSA-5888-ffcr-r425 x_refsource_CONFIRM
https://github.com/advisories/GHSA-5888-ffcr-r425 x_refsource_MISC
https://www.sonarsource.com/blog/blitzjs-prototype-pollution/ x_refsource_MISC