What is CVE-2023-49551?

CVE-2023-49551 is a high-severity vulnerability in Cesanta Mjs, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2024-01-02.

How severe is CVE-2023-49551?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Cesanta Mjs

CVE-2023-49551

An issue in Cesanta mjs 2.20.0 allows a remote attacker to cause a denial of service via the mjs_op_json_parse function in the msj.c file.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2024-01-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (53.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Cesanta Mjs — versions 2.20.0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

github.com/cesanta/mjs/issues/257 (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2023-49551?: CVE-2023-49551 is a high-severity vulnerability in Cesanta Mjs, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2024-01-02.
How severe is CVE-2023-49551?: High severity. CVSS v3 base score is 7.5 out of 10.