{"id":"CVE-2025-66631","title":"CSLA .NET is a framework designed for the development of reusable, object-oriented business layers for applications","summary":"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 …","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-502"],"vendor":"cslanet","product":"csla_.net","affected":["csla_.net < 6.0.0"],"patched":["csla_.net 6.0.0"],"published":"2025-12-09","updated":"2026-09-30","sourceUpdated":"2026-09-30T23:10:00.237","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-66631","references":[{"url":"https://github.com/MarimerLLC/csla/issues/4001","label":"security-advisories@github.com"},{"url":"https://github.com/MarimerLLC/csla/pull/4018","label":"security-advisories@github.com"},{"url":"https://github.com/MarimerLLC/csla/security/advisories/GHSA-wq34-7f4g-953v","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.00674,"epssPercentile":0.50299,"ingestedAt":"2026-09-30T23:29:32.482Z","slug":"CVE-2025-66631","body":"## Overview\n\nCSLA .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.\n\n## Affected\n\n- `csla_.net < 6.0.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `csla_.net 6.0.0`","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}