by Kastro
Paper/Archive/CVE-2025-66631

CVE-2025-66631

MarimerLLC csla — CSLA .NET is vulnerable to Remote Code Execution via WcfProxy

EPSS 0.7%CVSS 9.8
critical.is priorityof 100
40
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 52.1.521 × 2010.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE 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

ProductAffectedFixed inSource
csla< 6.0.0–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)7.2CVSS: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
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/MarimerLLC/csla/security/advisories/GHSA-wq34-7f4g-953vrefgithub.com/MarimerLLC/csla/issues/4001refgithub.com/MarimerLLC/csla/pull/4018