{"cve":"CVE-2021-23758","nvd":{"published":"2021-12-03T20:15:07.557","modified":"2026-08-27T04:16:38.863","status":"Analyzed","description":"All versions of package ajaxpro.2 are vulnerable to Deserialization of Untrusted Data due to the possibility of deserialization of arbitrary .NET classes, which can be abused to gain remote code execution.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-502"],"references":["http://packetstormsecurity.com/files/175677/AjaxPro-Deserialization-Remote-Code-Execution.html","https://github.com/michaelschwarz/Ajax.NET-Professional/commit/b0e63be5f0bb20dfce507cb8a1a9568f6e73de57","https://snyk.io/vuln/SNYK-DOTNET-AJAXPRO2-1925971","http://packetstormsecurity.com/files/175677/AjaxPro-Deserialization-Remote-Code-Execution.html","https://github.com/michaelschwarz/Ajax.NET-Professional/commit/b0e63be5f0bb20dfce507cb8a1a9568f6e73de57"],"products":["ajaxpro.2_project:ajaxpro.2","michaelschwarz:ajax.net_professional"],"source":"nvd","synced_at":"2026-10-19T21:25:41.256909649+00:00"},"epss":{"cve":"CVE-2021-23758","score":0.82578,"percentile":0.99665,"date":"2026-10-31"},"kev":{"cve":"CVE-2021-23758","date_added":"2026-08-26","due_date":"2026-09-09","vendor":"Ajax.NET Professional","product":"Ajax.NET Professional","known_ransomware":false},"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}