# Apereo CAS

> Project Apereo Central Authentication Service (CAS), is a multilingual single sign-on solution and identity provider for the web and attempts to meet your authentication and authorization needs.

**Wikidata**: [Q131422056](https://www.wikidata.org/wiki/Q131422056)  
**Source**: https://4ort.xyz/entity/apereo-cas

## Summary
Project Apereo Central Authentication Service (CAS) is a multilingual single sign-on solution and open-source identity provider for the web. It is designed to address authentication and authorization requirements for organizations and is developed under the Apache Software License 2.0.

## Key Facts
- **Entity Type:** Apereo CAS is classified as **free software**.
- **Description:** It is a multilingual single sign-on (SSO) solution and identity provider for the web.
- **License:** Distributed under the **Apache Software License 2.0**.
- **Repository:** Source code is hosted at **github.com/apereo/cas**.
- **Website:** Official documentation and information are available at **apereo.github.io/cas/**.
- **Aliases:** Also known as **Central Authentication Service**, **SSO CAS**, or simply **CAS**.
- **Latest Version (per data):** The most recent version listed is **7.3.2**, released on **2025-12-06**.
- **Copyright Status:** The software is **copyrighted**.

## FAQs
### Q: What is Apereo CAS used for?
A: Apereo CAS is used as a multilingual single sign-on solution and identity provider for the web. It aims to meet various authentication and authorization needs for users and organizations.

### Q: Under what license is Apereo CAS distributed?
A: Apereo CAS is distributed under the Apache Software License 2.0. It is classified as free software, allowing users to freely run, study, change, and distribute it.

### Q: Where can I find the source code for Apereo CAS?
A: The source code repository for Apereo CAS is publicly available on GitHub at https://github.com/apereo/cas.

### Q: Is Apereo CAS considered free or open-source software?
A: Yes, Apereo CAS is an instance of **free software**. It is a facet of a computer program that allows users to run, study, change, and distribute it.

## Why It Matters
Apereo CAS matters because it provides a robust, open-source solution for one of the most critical challenges in web security: centralized identity management and single sign-on. By offering a multilingual platform that handles both authentication and authorization, it allows organizations to secure their web applications without relying on proprietary, closed-source vendors. Its classification as free software under the Apache 2.0 license ensures that it is not only accessible for deployment but also adaptable, giving institutions the freedom to modify the code to fit specific infrastructure requirements. The project's active development lifecycle, evidenced by frequent version releases, demonstrates a commitment to maintaining security standards and evolving features in response to modern web needs.

## Notable For
- Being a **multilingual single sign-on solution** and identity provider.
- Functioning as an **authentication and authorization** platform for the web.
- Classification as **free software**, distributed under the **Apache Software License 2.0**.
- Hosting its source code openly on **GitHub**, ensuring transparency and community accessibility.
- A highly active release cycle, with the recorded version history spanning from 6.0.3 (April 2019) to 7.3.2 (December 2025).

## Body
### Definition and Purpose
Apereo CAS is identified formally as Project Apereo Central Authentication Service. It functions as a **multilingual single sign-on solution** and serves as an **identity provider** specifically designed for the web. The primary objective of the software is to address and meet the authentication and authorization needs of its users.

### Licensing and Classification
The project is explicitly classified as an instance of **free software**. This classification means it is software distributed under terms that allow users to freely run, study, change, and distribute it, including modified versions. Specifically, Apereo CAS is distributed under the **Apache Software License 2.0**. Although it is free software, the project retains a **copyrighted** status.

### Development and Release History
The development of Apereo CAS is characterized by a frequent and ongoing release schedule. The project maintains a detailed version history, with stable releases recorded across major versions 6, 7, and even into version 7.3.x in the provided data.

**Recent Release Highlights:**
- Version **7.1.3** was released on **2024-12-06**.
- Version **6.0.3** (stable) was released on **2019-04-05**.
- The dataset tracks stable releases across major lines, such as **6.1.x**, **6.2.x**, **6.3.x**, **6.4.x**, **6.5.x**, **6.6.x**, **7.0.x**, **7.1.x**, and **7.2.x**.
- The most recent version noted in the data is **7.3.2**, marked as a stable version with a publication date of **2025-12-06**.

### Technical Infrastructure
The project operates an open development model. Its **source code repository** is located at **github.com/apereo/cas**. For users and developers, the **official website** and **manual pages** are hosted at **apereo.github.io/cas/**. Information regarding the project's usage policy concerning free, libre, and open-source software can be found at **apereo.github.io/cas/developer/Project-Committee.html**.

## References

1. [Source](https://github.com/apereo/cas/releases/tag/v7.1.3)
2. [Release 6.0.3. 2019](https://github.com/apereo/cas/releases/tag/v6.0.3)
3. [Release 6.0.4. 2019](https://github.com/apereo/cas/releases/tag/v6.0.4)
4. [Release 6.0.5. 2019](https://github.com/apereo/cas/releases/tag/v6.0.5)
5. [Release 6.0.5.1. 2019](https://github.com/apereo/cas/releases/tag/v6.0.5.1)
6. [Release 6.0.6. 2019](https://github.com/apereo/cas/releases/tag/v6.0.6)
7. [Release 6.0.7. 2019](https://github.com/apereo/cas/releases/tag/v6.0.7)
8. [Release 6.0.8. 2019](https://github.com/apereo/cas/releases/tag/v6.0.8)
9. [Release 6.0.8.1. 2020](https://github.com/apereo/cas/releases/tag/v6.0.8.1)
10. [Release 6.1.0. 2019](https://github.com/apereo/cas/releases/tag/v6.1.0)
11. [Release 6.1.1. 2019](https://github.com/apereo/cas/releases/tag/v6.1.1)
12. [Release 6.1.2. 2019](https://github.com/apereo/cas/releases/tag/v6.1.2)
13. [Release 6.1.3. 2019](https://github.com/apereo/cas/releases/tag/v6.1.3)
14. [Release 6.1.4. 2020](https://github.com/apereo/cas/releases/tag/v6.1.4)
15. [Release 6.1.5. 2020](https://github.com/apereo/cas/releases/tag/v6.1.5)
16. [Release 6.1.6. 2020](https://github.com/apereo/cas/releases/tag/v6.1.6)
17. [Release 6.1.7. 2020](https://github.com/apereo/cas/releases/tag/v6.1.7)
18. [Release 6.1.7.1. 2020](https://github.com/apereo/cas/releases/tag/v6.1.7.1)
19. [Release 6.1.7.2. 2020](https://github.com/apereo/cas/releases/tag/v6.1.7.2)
20. [Release 6.2.0. 2020](https://github.com/apereo/cas/releases/tag/v6.2.0)
21. [Release 6.2.1. 2020](https://github.com/apereo/cas/releases/tag/v6.2.1)
22. [Release 6.2.2. 2020](https://github.com/apereo/cas/releases/tag/v6.2.2)
23. [Release 6.2.3. 2020](https://github.com/apereo/cas/releases/tag/v6.2.3)
24. [Release 6.2.4. 2020](https://github.com/apereo/cas/releases/tag/v6.2.4)
25. [Release 6.2.5. 2020](https://github.com/apereo/cas/releases/tag/v6.2.5)
26. [Release 6.2.6. 2020](https://github.com/apereo/cas/releases/tag/v6.2.6)
27. [Release 6.2.7. 2020](https://github.com/apereo/cas/releases/tag/v6.2.7)
28. [Release 6.2.8. 2021](https://github.com/apereo/cas/releases/tag/v6.2.8)
29. [Release 6.3.0. 2020](https://github.com/apereo/cas/releases/tag/v6.3.0)
30. [Release 6.3.1. 2021](https://github.com/apereo/cas/releases/tag/v6.3.1)
31. [Release 6.3.2. 2021](https://github.com/apereo/cas/releases/tag/v6.3.2)
32. [Release 6.3.3. 2021](https://github.com/apereo/cas/releases/tag/v6.3.3)
33. [Release 6.3.4. 2021](https://github.com/apereo/cas/releases/tag/v6.3.4)
34. [Release 6.3.5. 2021](https://github.com/apereo/cas/releases/tag/v6.3.5)
35. [Release 6.3.6. 2021](https://github.com/apereo/cas/releases/tag/v6.3.6)
36. [Release 6.3.7. 2021](https://github.com/apereo/cas/releases/tag/v6.3.7)
37. [Release 6.3.7.1. 2021](https://github.com/apereo/cas/releases/tag/v6.3.7.1)
38. [Release 6.3.7.2. 2021](https://github.com/apereo/cas/releases/tag/v6.3.7.2)
39. [Release 6.3.7.3. 2021](https://github.com/apereo/cas/releases/tag/v6.3.7.3)
40. [Release 6.3.7.4. 2021](https://github.com/apereo/cas/releases/tag/v6.3.7.4)
41. [Release 6.4.0. 2021](https://github.com/apereo/cas/releases/tag/v6.4.0)
42. [Release 6.4.1. 2021](https://github.com/apereo/cas/releases/tag/v6.4.1)
43. [Release 6.4.2. 2021](https://github.com/apereo/cas/releases/tag/v6.4.2)
44. [Release 6.4.3. 2021](https://github.com/apereo/cas/releases/tag/v6.4.3)
45. [Release 6.4.4. 2021](https://github.com/apereo/cas/releases/tag/v6.4.4)
46. [Release 6.4.4.1. 2021](https://github.com/apereo/cas/releases/tag/v6.4.4.1)
47. [Release 6.4.4.2. 2021](https://github.com/apereo/cas/releases/tag/v6.4.4.2)
48. [Release 6.4.5. 2022](https://github.com/apereo/cas/releases/tag/v6.4.5)
49. [Release 6.4.6. 2022](https://github.com/apereo/cas/releases/tag/v6.4.6)
50. [Release 6.4.6.1. 2022](https://github.com/apereo/cas/releases/tag/v6.4.6.1)