CVE-2025-66631

CSLA .NET is vulnerable to Remote Code Execution via WcfProxy

Published Dec 9, 2025 CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-wq34-7f4g-953v Csla affected by Remote Code Execution via WcfProxy (NetDataContractSerializer)
History
Type Values Removed Values Added
First Time appeared Cslanet
Cslanet csla .net
CPEs cpe:2.3:a:marimer:csla_.net:*:*:*:*:*:*:*:* cpe:2.3:a:cslanet:csla_.net:*:*:*:*:*:*:*:*
Vendors & Products Marimer csla .net
Cslanet
Cslanet csla .net
Type Values Removed Values Added
First Time appeared Marimer csla .net
CPEs cpe:2.3:a:marimer:csla_.net:*:*:*:*:*:*:*:*
Vendors & Products Marimer csla .net
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Marimer
Marimer csla
Vendors & Products Marimer
Marimer csla
Type Values Removed Values Added
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.
Title CSLA .NET is vulnerable to Remote Code Execution via WcfProxy
Weaknesses CWE-502
References
Metrics cvssV4_0

{'score': 7.2, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Dec 9, 2025, 3:15 PM
Reserved
Dec 5, 2025, 3:42 PM
Status
Analyzed
Published
Dec 9, 2025, 4:18 PM
Modified
Oct 7, 2026, 8:10 PM