Cannot Remove or Edit Properties of an Attachment with Umlaut Characters

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  1. Attachment contains an umlaut or other special character, e.g. äüö.xls

  2. Attachment deletion fails with "Not Permitted" page even though user has sufficient permission:

    Not Permitted
    You are not permitted to perform this operation.
  3. Viewing or editing the properties of the attachment leads to a System Error page with the following stacktrace:

     at com.atlassian.confluence.pages.actions.MoveAttachmentAction.bootstrap( 


  • The application server URL encoding is not set to UTF-8.
  • The URL encoding attribute is written wrongly or is incorrectly cased, hence Tomcat doesn't understand and pick it up. For example: URIencoding is wrong because it should have an uppercase E, and URlEncoding is wrong because it has a lowercase L instead of an uppercase I. The correct attribute is URIEncoding. It should look like this:



  1. Set your application server URL encoding to UTF-8 as described here. For example, in Tomcat add URIEncoding="UTF-8" to the HTTP connector.
  2. Restart Confluence.

(info) You might need to apply this to all available connectors, too (e.g. AJP connector).

Last modified on Nov 15, 2018

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