Vulnerability Description
A UI misrepresentation vulnerability was identified in GitHub Enterprise Server that allowed more permissions to be granted during a GitHub App's user-authorization web flow than was displayed to the user during approval. To exploit this vulnerability, an attacker would need to create a GitHub App on the instance and have a user authorize the application through the web authentication flow. All permissions being granted would properly be shown during the first authorization, but in certain circumstances, if the user revisits the authorization flow after the GitHub App has configured additional user-level permissions, those additional permissions may not be shown, leading to more permissions being granted than the user potentially intended. This vulnerability affected GitHub Enterprise Server 3.0.x prior to 3.0.7 and 2.22.x prior to 2.22.13. It was fixed in versions 3.0.7 and 2.22.13. This vulnerability was reported via the GitHub Bug Bounty program.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Github | Enterprise Server | >= 2.20.0, < 2.22.13 |
Related Weaknesses (CWE)
References
- https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.13
- https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.7
- https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.13
- https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.7
FAQ
What is CVE-2021-22866?
CVE-2021-22866 is a vulnerability with a CVSS score of 8.8 (HIGH). A UI misrepresentation vulnerability was identified in GitHub Enterprise Server that allowed more permissions to be granted during a GitHub App's user-authorization web flow than was displayed to the ...
How severe is CVE-2021-22866?
CVE-2021-22866 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-22866?
Check the references section above for vendor advisories and patch information. Affected products include: Github Enterprise Server.