Posts

Is Custom Script Dangerous

Allowing custom script has its security implications. But what exactly does it mean? Is it dangerous? My colleauge Daniel and me have done a little experiment. There are two implications stated on MS Docs:

  • Scripts have access to everything the user has access to.
  • Scripts can access content across several Office 365 services and even beyond with Microsoft Graph integration.

To summarize, we can look at that picture:

So the risk that user 1 (the Blue User) intentionally or unintentionally places a script and lets user 2 (the Red User) run this script by linking to the page that has this script. The page must be in a “common” place.

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Posts

Ändra content i ContentEditorWebPart

Det finns ett exempel här.

//defaultAspx är sidan (SPListItem i Sidor)
//måste checkas ut först
//mgr är WebPartManager
//wp är contentEditorWebPart
web.AllowUnsafeUpdates = true;
XmlDocument xmlDoc = new XmlDocument();
XmlElement xmlElement = xmlDoc.CreateElement("Content");
xmlElement.InnerText = ((Microsoft.SharePoint.WebPartPages.ContentEditorWebPart)wp).Content.InnerText.ToString();
xmlElement.InnerText = xmlElement.InnerText.ToString().Replace("#HEADING#", "Welcome for welcome");
wp.Content = xmlElement;
mgr.SaveChanges(wp);
defaultAspx.File.CheckIn("");
defaultAspx.File.Publish("");
web.AllowUnsafeUpdates = false;
```Man måste skapa nytt XmlDocument och XmlElement, om man försöker skriva direkt till wp.Content.InnerText kommer det inte uppdateras. I det här fallet, byter vi ut #HEADING# mot något mer passande.
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