CVE-2021-23543
Prototype Pollution in realms-shim
9.8
CRITICAL
CVSS 3.1
EPSS 0.56%
Description
All versions of package realms-shim are vulnerable to Sandbox Bypass via a Prototype Pollution attack vector.
How to fix CVE-2021-23543
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- npm/realms-shim—no fix listed
Is CVE-2021-23543 being exploited?
Low — EPSS is 0.6%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, <= 1.2.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |