Csla affected by Remote Code Execution via WcfProxy (NetDataContractSerializer)
Impact
Versions of CSLA .NET prior to version 6 allow the use of WcfProxy. WcfProxy uses the NetDataContractSerializer (NDCS) which has known vulnerabilities that can allow remote execution of code during deserialization. NDCS itself is considered obsolete, and you should avoid using WcfProxy or upgrade to CSLA 6 or higher where this issue does not exist.
Patches
CSLA .NET version 6 and higher do not use WCF or NetDataContractSerializer.
Workarounds
If you are using a version CSLA .NET older than version 6, you should stop using WcfProxy in your data portal configuration. Doing this avoids the use of WCF and the NetDataContractSerializer, avoiding the vulnerability.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | Csla | < 6.0.0 | 6.0.0 |
References
- https://github.com/MarimerLLC/csla/security/advisories/GHSA-wq34-7f4g-953v
- https://nvd.nist.gov/vuln/detail/CVE-2025-66631
- https://github.com/MarimerLLC/csla/issues/4001
- https://github.com/MarimerLLC/csla/pull/4018
- https://github.com/MarimerLLC/csla
- https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/quality-rules/ca2310
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U- Weakness (CWE)
CWE-502- Platform
- .NET (NuGet)
- Package
Csla- Disclosed
- 08.12.2025
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-wq34-7f4g-953v - CC BY 4.0
Vulnerability history: Csla
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 07.2024 12.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 1
Disclosures per year
- 2024: 1
- 2025: 1
- 2026: 0
-
Csla affected by Remote Code Execution via WcfProxy (NetDataContractSerializer) this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.