What’s Vulnerable › Vulnerabilities

CVE-2022-39298: Deserialization of untrusted data in MelisFront

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-10-12 · updated 2026-06-17
• Weakness: CWE-502

Description

MelisFront is the engine that displays website hosted on Melis Platform. It deals with showing pages, plugins, URL rewritting, search optimization and SEO, etc. Attackers can deserialize arbitrary data on affected versions of `melisplatform/melis-front`, 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-front` >= 5.0.1. This issue was addressed by restricting allowed classes when deserializing user-controlled data.

Affected products

• Melistechnology Meliscms: before 5.0.1 — fixed in 5.0.1

How to fix

Upgrade to a fixed version: Melistechnology Meliscms 5.0.1. Check the vendor advisory for mitigations.

References

• https://github.com/melisplatform/melis-front/commit/89ae612d5f1f7aa2fb621ee8de27dffe1feb851e
• https://github.com/melisplatform/melis-front/security/advisories/GHSA-h479-2mv4-5c26
• https://github.com/melisplatform/melis-front/commit/89ae612d5f1f7aa2fb621ee8de27dffe1feb851e
• https://github.com/melisplatform/melis-front/security/advisories/GHSA-h479-2mv4-5c26

Get alerted when CVE-2022-39298 or the next vulnerability affects your stack