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# Changelog

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## 2.0.4
This release fixes a security vulnerability caused by the CORS implementation.
Support for cross-origin requests has been removed. Use ARSnova version 2.2 or
newer for proper CORS. (Reported by Rainer Rillke at Wikimedia)

Additional changes:
* Libraries have been upgraded to fix potential bugs

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## 2.1.1
This release fixes a security vulnerability in the account management API. It is
highly recommended to upgrade if you are using database authentication.

Additional changes:
* Libraries have been upgraded to fix potential bugs

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## 2.0.3
This release fixes a security vulnerability in the account management API. It is
highly recommended to upgrade if you are using database authentication.

Additional changes:
* Libraries have been upgraded to fix potential bugs
* Some unnecessary log warnings for Websocket communication are filtered

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## 2.1
Major features:
* Public Pool (experimental): It is now possible to share sessions with other
  users in a pool of public sessions. Other users can create their own copies of
  shared sessions. This feature can be enabled in the arsnova.properties
  configuration.

Minor features and changes:
* Adjustments to correctly handle requests for imports from the frontend.
* Some communication between the frontend and backend has been optimized for
  improved performance.
* Additional configuration parameters for tracking, session export and import, a
  demo session and a blog URL have been introduced.

**This version is brought to you by:**  
Project management: Klaus Quibeldey-Cirkel  
Lead programming: Andreas Gärtner, Daniel Gerhardt, Christoph Thelen  
Contributions: Felix Schmidt, Artjom Siebert, Daniel Vogel  
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Sponsoring: [AG QLS](https://www.thm.de/site/en/hochschule/service/ag-qls.html),
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[HMWK](https://wissenschaft.hessen.de/wissenschaft/it-neue-medien/kompetenznetz-e-learning-hessen)  


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## 2.0.2
This release updates dependencies. The updated library for Socket.IO support
fixes memory leaks and disables SSL 3.0 support (POODLE vulnerability).

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## 2.0.1
This release introduces the following changes:
* Updates dependency for Socket.IO support to fix memory leaks
* Usernames for student's questions and free text answers are no longer exposed
  by API responses

## 2.0.0
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ARSnova 2.0 has been in development for more than two years. Further releases
can be expected much more frequently.

This is actually the first major release of ARSnova Backend. It is called 2.0 to
feature API compatibility with the simultaneously released ARSnova Mobile 2.0.

**This version is brought to you by:**  
Project management: Klaus Quibeldey-Cirkel  
Lead programming: Andreas Gärtner, Daniel Gerhardt, Christoph Thelen,
Paul-Christian Volkmer  
Contributions: Sören Gutzeit, Julian Hochstetter, Jan Kammer, Daniel Knapp,
Felix Schmidt, Artjom Siebert, Daniel Vogel  
Testing & Feedback: Kevin Atkins, Kathrin Jäger  
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Sponsoring: [AG QLS](https://www.thm.de/site/en/hochschule/service/ag-qls.html),
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[HMWK](https://wissenschaft.hessen.de/wissenschaft/it-neue-medien/kompetenznetz-e-learning-hessen),
[@LLZ](http://llz.uni-halle.de/)