RSS Viewer Web Part failing after installing KB2810059

I was recently troubleshooting against a SharePoint 2010 Farm where users were suddenly reporting that the RSS Web Part was not loading when it was active on a page which also had the Content Editor Web Part deployed. So, what’s changed?

I soon discovered that although the Farm had only been patched from a SharePoint Server perspective to February 2012 CU, the build number was reflecting 14.0.6137.5002 – which is April 2013 CU. Further investigation led to me discovering that a SharePoint Foundation patch (ttp:// had been deployed by mistake as it was perceived to be a Windows Security patch. Subsequently, any SharePoint site which had Publishing turned on was failing to load the RSS Viewer when it shared a page with the CEWP.

Having consulted Microsoft about this issue, I was pleased to hear that this has been recognised as a bug…….although it won’t be fixed until either June 2013 CU, or Service Pack 2 – whichever is released first.

The suggested workaround was to either ‘Disable Web Page Security Validation’ at the Web App level (OK, it works, but it’s not recommended due to the security concern)

Or, apply the following Javascript:

)      Page Level: Adding a Content Web Part to the page that is having the problem, and using a custom script with it.

a)     Save the following JavaScript to a .txt file and upload the file to any document library in the root of the site. 

<Script Type=”text/javascript”> 

function CustomUpdateFormDigest() 

if(window._spPageContextInfo != null) 

var $v_2 = window._spPageContextInfo; 

var $v_3 = $v_2.webServerRelativeUrl; 

var $v_4 = window._spFormDigestRefreshInterval; 

UpdateFormDigest($v_3, $v_4); 



b)    Add a “Content Editor” web part from “Media and Content” web parts category to the page not rendering web parts.

c)     Edit the “Content Editor” web part and link its content to the .txt file path we created and uploaded in Step 1 using the “Content Link” field.

d)    Hide the web part by checking “Hidden” under “Layout”.

e)     Save and publish the page.





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