CVE-2023-49553

Cesanta Mjs vulnerability

7.5 HIGHPublic exploitEPSS 0.86%

Published2 Jan 2024

Description

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

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Cesanta Mjs2.20.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

Patch & vendor advisories

https://github.com/cesanta/mjs/issues/253

References

https://github.com/cesanta/mjs/issues/253ExploitVendor Advisory

Frequently asked

Is CVE-2023-49553 being actively exploited?

CVE-2023-49553 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.86%.

How severe is CVE-2023-49553?

CVE-2023-49553 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.86% probability of exploitation.

Which products are affected by CVE-2023-49553?

Affected products include Cesanta Mjs.

How do I fix CVE-2023-49553?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-49553 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation works Book a demo

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.