Use After Free in Cesanta Mjs

CVE-2021-46525

Cesanta MJS v2.20.0 was discovered to contain a heap-use-after-free via mjs_apply at src/mjs_exec.c.

Vulnerability class: Use-After-Free

EPSS: 0.008 (52.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Cesanta Mjs — versions 2.20.0
N/a — versions n/a

Weakness classification (CWE)

CWE-416 — Use After Free

References

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

Frequently asked questions

What is CVE-2021-46525?: CVE-2021-46525 is a high-severity vulnerability in Cesanta Mjs, classified under Use After Free. CVSS score: 7.8/10. Published 2022-01-27.
How severe is CVE-2021-46525?: High severity. CVSS v3 base score is 7.8 out of 10.