CVE-2021-22866 Security feature bypass in GitHub Enterprise Server
UI misrepresentation in GitHub Enterprise Server allows attackers to obtain excessive user permissions during app authorization flows.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-22866?
CVE-2021-22866 is a high-severity vulnerability in Github Enterprise Server, published on 14 May 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2021-22866?
It affects 1 product.
Products include Github Enterprise Server.
How do I fix CVE-2021-22866?
No fix has been published for CVE-2021-22866 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-22866 being exploited?
There is no known exploitation of CVE-2021-22866 in the wild and no public exploit code.
Other vulnerabilities in Github Enterprise Server
- CVE-2024-4985 Auth bypass in Enterprise Server
- CVE-2022-23739 Missing authorization in GitHub Enterprise Server
- CVE-2022-46255 Improper Limitation of a Pathname to a Restricted Directory in GitHub Enterprise Server leading to RCE
- CVE-2021-22869 Improper access control in GitHub Enterprise Server allows self-hosted runners to execute outside their control group
- CVE-2024-9487 Auth bypass in Enterprise Server
Sources
Also known as GHSA-2p62-w27q-9g83.