Deserialization in Cslanet Csla_.net
CVE-2025-66631
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…
Vulnerability class: Insecure Deserialization
EPSS: 0.006 (42.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Cslanet Csla_.net
- Marimerllc Csla — versions < 6.0.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2025-66631?
- CVE-2025-66631 is a critical-severity vulnerability in Cslanet Csla_.net, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2025-12-09.
- How severe is CVE-2025-66631?
- Critical severity. CVSS v3 base score is 9.8 out of 10.