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 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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/MarimerLLC/csla/issues/4001	Issue Tracking
https://github.com/MarimerLLC/csla/pull/4018	Issue Tracking Patch
https://github.com/MarimerLLC/csla/security/advisories/GHSA-wq34-7f4g-953v	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:marimer:csla_.net:*:*:*:*:*:*:*:*

History

17 Mar 2026, 20:28

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8
References	~~() https://github.com/MarimerLLC/csla/issues/4001 -~~	() https://github.com/MarimerLLC/csla/issues/4001 - Issue Tracking
References	~~() https://github.com/MarimerLLC/csla/pull/4018 -~~	() https://github.com/MarimerLLC/csla/pull/4018 - Issue Tracking, Patch
References	~~() https://github.com/MarimerLLC/csla/security/advisories/GHSA-wq34-7f4g-953v -~~	() https://github.com/MarimerLLC/csla/security/advisories/GHSA-wq34-7f4g-953v - Mitigation, Vendor Advisory
First Time		Marimer Marimer csla .net
CPE		cpe:2.3:a:marimer:csla_.net::::::::

09 Dec 2025, 16:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-09 16:18

Updated : 2026-03-17 20:28

NVD link : CVE-2025-66631

Mitre link : CVE-2025-66631

CVE.ORG link : CVE-2025-66631

JSON object : View

Products Affected

marimer

csla_.net

CWE

CWE-502

Deserialization of Untrusted Data

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