CVE•Published 2025-12-09•Modified 2026-10-07•1 article on news•4 live references•NVD data
CVE-2025-66631Cslanet · Csla_.net
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
51
Exploit Prediction Scoring System · top 49% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2025-12-09
Modified 2026-10-07
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2025-66631Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Cslanet Csla .net"All exposed Cslanet Csla .net instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Csla .net"HTTP body or banner mentions "Csla .net" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2025-66631Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-66631Censys host search filtered to this CVE id.
grep.app
CVE-2025-66631Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2025-66631GitHub code search for direct mentions.
Google dork
"CVE-2025-66631" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2025-66631 on GitHub.