What is CVE-2021-46331?

CVE-2021-46331 is a medium-severity vulnerability in Moddable Sdk. CVSS score: 5.5/10. Published 2022-01-20.

How severe is CVE-2021-46331?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Moddable Sdk

CVE-2021-46331

Moddable SDK v11.5.0 was discovered to contain a SEGV vulnerability via xs/sources/xsProxy.c in fxProxyGetPrototype.

Published 2022-01-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Moddable Sdk — versions 11.5.0

References

github.com/Moddable-OpenSource/moddable/issues/750 (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-46331?: CVE-2021-46331 is a medium-severity vulnerability in Moddable Sdk. CVSS score: 5.5/10. Published 2022-01-20.
How severe is CVE-2021-46331?: Medium severity. CVSS v3 base score is 5.5 out of 10.