CVE-2025-66631

CRITICAL

9.8

Description

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published12/9/2025

Last Modified3/25/2026

Sourcenvd

Honeypot Sightings0

Affected Products

cslanet:csla_.net

Weaknesses (CWE)

CWE-502

References

https://github.com/MarimerLLC/csla/issues/4001(security-advisories@github.com)

https://github.com/MarimerLLC/csla/pull/4018(security-advisories@github.com)

https://github.com/MarimerLLC/csla/security/advisories/GHSA-wq34-7f4g-953v(security-advisories@github.com)

IOC Correlations

No correlations recorded

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