What is CVE-2021-29328?

CVE-2021-29328 is a high-severity vulnerability in Moddable, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2021-11-19.

How severe is CVE-2021-29328?

High severity. CVSS v3 base score is 7.1 out of 10.

Out-of-bounds Read in Moddable

CVE-2021-29328

OpenSource Moddable v10.5.0 was discovered to contain buffer over-read in the fxDebugThrow function at /moddable/xs/sources/xsDebug.c.

Vulnerability class: Buffer Overflow

Published 2021-11-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (52.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.6% 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 — versions 10.5.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

github.com/Moddable-OpenSource/moddable/issues/585 (Exploit, Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-29328?: CVE-2021-29328 is a high-severity vulnerability in Moddable, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2021-11-19.
How severe is CVE-2021-29328?: High severity. CVSS v3 base score is 7.1 out of 10.