What is CVE-2021-23543?

CVE-2021-23543 is a critical-severity vulnerability in Agoric Realms-Shim, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 9.8/10. Published 2022-01-10.

How severe is CVE-2021-23543?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Prototype Pollution in Agoric Realms-Shim

CVE-2021-23543

All versions of package realms-shim are vulnerable to Sandbox Bypass via a Prototype Pollution attack vector.

Vulnerability class: Prototype Pollution

EPSS: 0.018 (75.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Agoric Realms-shim
N/a Realms-shim — versions 0

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

report@snyk.io (Product, Third Party Advisory, x_refsource_MISC)
report@snyk.io (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-23543?: CVE-2021-23543 is a critical-severity vulnerability in Agoric Realms-Shim, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 9.8/10. Published 2022-01-10.
How severe is CVE-2021-23543?: Critical severity. CVSS v3 base score is 9.8 out of 10.