What is CVE-2021-33443?

CVE-2021-33443 is a medium-severity vulnerability in Cesanta Mjs, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2022-07-26.

How severe is CVE-2021-33443?

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

Buffer overflow in Cesanta Mjs

CVE-2021-33443

An issue was discovered in mjs (mJS: Restricted JavaScript engine), ES6 (JavaScript version 6). There is stack buffer overflow in mjs_execute() in mjs.c.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (26.4th percentile) — read the EPSS interpretation.

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.

Affected products

Cesanta Mjs
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

cve@mitre.org (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-33443?: CVE-2021-33443 is a medium-severity vulnerability in Cesanta Mjs, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2022-07-26.
How severe is CVE-2021-33443?: Medium severity. CVSS v3 base score is 5.5 out of 10.