A JIRA administrator can place certain tags inadvertently unclosed in the Announcement Banner configurations, causing most of JIRA to not render. This includes the administration pane as well, so that the administrator will not be able to fix this behavior via the UI.

Steps to reproduce:

• Edit the announcement banner to include the following:

  <script>

• Save

Workaround:

A workaround is to reset the announcement banner to blank via the database:

• Pull up the announcement banner property ID and content via:

  select pt.id, pt.propertyvalue from propertytext pt join propertyentry pe on pt.id=pe.id where pe.property_key='jira.alertheader';

• Make a note of the ID number and set the banner contents to blank via:

  update propertytext set propertyvalue='' where id='<id from above>';