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RSS feed webpart issue

susmitha 266 Reputation points
2021-10-26T14:34:22.687+00:00

Hi,

We have done September 2021 patching for our Sharepoint 2013 servers. Since then our customized RSS feed webpart doesn't work. Below is the error message.

WPProperty has been blocked for security reason. blocked AssemblyQualifiedName is *****.******.Intranet.WebParts.WPRssFeedWP, *********.********.*****.Solutions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=76f4acee2fd20171 | blocked property name is FeedUrl

Is there any issue reported for September patch lately? Our out of box RSS feed webpart works fine. Could you kindly help me with this. This is one of the important webparts over our homepage.

Regards,
Susmitha.

Microsoft 365 and Office | SharePoint Server | Development
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  1. CaseyYang-MSFT 10,466 Reputation points
    2021-10-27T01:45:53.08+00:00

    Hi @susmitha ,

    Like sadomovalex said, the security update for SharePoint 2013 fixes an issue in which Web Parts that depend on WPProperty don't work correctly. But to enable the Web Parts to work, you have to also follow the steps that are provided in KB 5003528 to declare the affected .NET types to be allowed to access WPProperty in the Web.config file.

    For Reference: Web Parts that depend on WPProperty may no longer work correctly in SharePoint Server (KB5003528)

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