UmbracoIdentityExtensions is an Umbraco add-on package that enables easy extensibility points for ASP.Net Identity integration. In affected versions client secrets are not required which may expose some endpoints to untrusted actors. Since Umbraco is not a single-page application, the implicit flow is not safe. For traditional MVC applications, it is recommended to use the authorization code flow, which requires the client to authenticate with the authorization server using a client secret. This flow provides better security, as it involves exchanging an authorization code for an access token and/or ID token, rather than directly returning tokens in the URL fragment. This issue has been patched in commit `e792429f9` and a release to Nuget is pending. Users are advised to upgrade when possible.

Total.js framework (npm package total.js) is a framework for Node.js platfrom written in pure JavaScript similar to PHP's Laravel or Python's Django or ASP.NET MVC. In total.js framework before version 3.4.9, calling the utils.set function with user-controlled values leads to code-injection. This can cause a variety of impacts that include arbitrary code execution. This is fixed in version 3.4.9.

Telerik Extensions for ASP.NET MVC (all versions) does not whitelist requests, which can allow a remote attacker to access files inside the server's web directory. NOTE: this product has been obsolete since June 2013.

A Security Feature Bypass vulnerability exists in ASP.NET when the number of incorrect login attempts is not validated, aka "ASP.NET Security Feature Bypass Vulnerability." This affects ASP.NET, ASP.NET Core 1.1, ASP.NET Core 1.0, ASP.NET Core 2.0, ASP.NET MVC 5.2.

A denial of service vulnerability exists when the ASP.NET Core fails to properly validate web requests. NOTE: Microsoft has not commented on third-party claims that the issue is that the TextEncoder.EncodeCore function in the System.Text.Encodings.Web package in ASP.NET Core Mvc before 1.0.4 and 1.1.x before 1.1.3 allows remote attackers to cause a denial of service by leveraging failure to properly calculate the length of 4-byte characters in the Unicode Non-Character range.

Directory traversal vulnerability in the File Manager component in DevExpress ASPxFileManager Control for ASP.NET WebForms and MVC before 13.1.10 and 13.2.x before 13.2.9 allows remote authenticated users to read or write arbitrary files via a .. (dot dot) in the __EVENTARGUMENT parameter.