{"cve":"CVE-2021-28141","nvd":{"published":"2021-03-11T17:15:13.267","modified":"2026-06-17T03:45:52.030","status":"Modified","description":"An issue was discovered in Progress Telerik UI for ASP.NET AJAX 2021.1.224. It allows unauthorized access to MicrosoftAjax.js through the Telerik.Web.UI.WebResource.axd file. This may allow the attacker to gain unauthorized access to the server and execute code. To exploit, one must use the parameter _TSM_HiddenField_ and inject a command at the end of the URI. NOTE: the vendor states that this is not a vulnerability. The request's output does not indicate that a \"true\" command was executed on the server, and the request's output does not leak any private source code or data from the server","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-862"],"references":["https://gist.github.com/shreyasfegade/e2480e26b2ed1d0c7175ecf7cb15f9c1","https://pastebin.com/JULpfvFJ","https://gist.github.com/shreyasfegade/e2480e26b2ed1d0c7175ecf7cb15f9c1","https://pastebin.com/JULpfvFJ"],"products":["progress:telerik_ui_for_asp.net_ajax"],"source":"nvd","synced_at":"2026-10-19T21:15:50.279857260+00:00"},"epss":{"cve":"CVE-2021-28141","score":0.0232,"percentile":0.83463,"date":"2026-11-01"},"kev":null,"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."]}