Deserialization of untrusted data in MelisCms
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-502.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Melis Technology | melis-cms | up to 5.0.0 | — | No fix listed | CNA |
| — | melisplatform/melis-cms (Packagist) | before 5.0.1 | 5.0.1 | Patch available | GHSA-m3m3-6gww-7gj9 |
- melis-cms VendorMelis Technology Affected up to 5.0.0 Fixed in — No fix listed CNA
- melisplatform/melis-cms (Packagist) Vendor— Affected before 5.0.1 Fixed in 5.0.1 Patch available GHSA-m3m3-6gww-7gj9
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:melistechnology:meliscms:*:*:*:*:*:*:*:* | before 5.0.1 | Vulnerable | Melis Technology |
- cpe:2.3:a:melistechnology:meliscms:*:*:*:*:*:*:*:* Versions before 5.0.1 Vulnerable ·Melis Technology
Remediation
- Fix · GHSA-m3m3-6gww-7gj9 melisplatform/melis-cms (Packagist) Fixed in 5.0.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2022-39297
- 2026-10-03 Alias added: GHSA-m3m3-6gww-7gj9
References
More Melis Technology Meliscms vulnerabilities
- TI-2022-18674 Deserialization of untrusted data in MelisFront CVSS 3.1CRITICAL 9.8
Sources
- CVE-2022-39297 · CVE Program
- CVE-2022-39297 · NVD
- FIRST EPSS
- GHSA-m3m3-6gww-7gj9 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences