CVE-2025-66631
Critical · 9.8CVSS
9.8
EPSS
0.7%
Published
Dec 9, 2025
CISA due date
—
The record
CSLA .NET is a framework designed for the development of reusable, object-oriented business layers for applications. Versions 5.5.4 and below allow the use of WcfProxy. WcfProxy uses the now-obsolete NetDataContractSerializer (NDCS) and is vulnerable to remote code execution during deserialization. This vulnerability is fixed in version 6.0.0. To workaround this issue, remove the WcfProxy in data portal configurations.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| NuGet | Csla | 0 | 6.0.0 |
Related vulnerabilities
- GHSA-wq34-7f4g-953v Csla affected by Remote Code Execution via WcfProxy (NetDataContractSerializer) Same vulnerability
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