CVE-2022-39297

Name: CVE-2022-39297
Creator: NVD / NIST
Published: 2022-10-12T23:15:09.623+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.94%

Last modified Jun 17, 2026

CVE-2022-39297 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. MelisCms provides a full CMS for Melis Platform, including templating system, drag'n'drop of plugins, SEO and many administration tools. Attackers can deserialize arbitrary data on affected versions of `melisplatform/melis-cms`, and ultimately leads to the execution of arbitrary PHP code on the system. EPSS estimates a 0.94% chance of exploitation in the next 30 days.

Description

MelisCms provides a full CMS for Melis Platform, including templating system, drag'n'drop of plugins, SEO and many administration tools. Attackers can deserialize arbitrary data on affected versions of `melisplatform/melis-cms`, and ultimately leads to the execution of arbitrary PHP code on the system. Conducting this attack does not require authentication. Users should immediately upgrade to `melisplatform/melis-cms` >= 5.0.1. This issue was addressed by restricting allowed classes when deserializing user-controlled data.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.94%

56.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Melistechnology	Meliscms	< 5.0.1

References

https://github.com/melisplatform/melis-cms/commit/d124b2474699a679a24ec52620cadceb3d4cec11Patch, Third Party Advisory
https://github.com/melisplatform/melis-cms/security/advisories/GHSA-m3m3-6gww-7gj9Third Party Advisory
https://github.com/melisplatform/melis-cms/commit/d124b2474699a679a24ec52620cadceb3d4cec11Patch, Third Party Advisory
https://github.com/melisplatform/melis-cms/security/advisories/GHSA-m3m3-6gww-7gj9Third Party Advisory

Timeline

Published: Oct 12, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-39297?

How severe is CVE-2022-39297?

CVE-2022-39297 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.94% probability of exploitation in the next 30 days.

How do I fix CVE-2022-39297?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-39297?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST