We upgraded the Telerik control to 2020.3.915.45 after we were hit by the Blue Mockingbird Vulnerability.
However, last weekend, we were hit again by the Blue Mockingbird Vulnerability. An ASPX file that contained this mark up was uploaded.
<asp:FileUpload ID="uplDosya" runat="server" />
<asp:Button ID="bntGonder" runat="server" Text="Submit" OnClick="btnGonder_Click" />
I've double-checked, we do have the latest version and we don only allow JPG as file extension.
Has anyone else been hit by Blue Mockingbird Vulnerability lately?