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CVE-2021-22866— UI misrepresentation of granted permissions in GitHub Enterprise Server leading to unauthorized access to user resources

Quick assessment

Affected
GitHub GitHub Enterprise Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GitHub Enterprise Server 是 （Github）开源的一个应用软件。提供一个将自己的GitHub实例设置为虚拟设备，从而提供可扩展，易于管理的平台。 GitHub Enterprise Server 存在安全漏洞，该漏洞源于UI错误描述。

AI Predicted 6.5 Difficulty: Moderate EPSS 1.04% · P63
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I. Basic Information for CVE-2021-22866

Vulnerability Information
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Vulnerability Title
UI misrepresentation of granted permissions in GitHub Enterprise Server leading to unauthorized access to user resources
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
关键信息的UI错误表达
Source: CVE Program / CVE List V5
Vulnerability Title
GitHub Enterprise Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GitHub Enterprise Server 是 （Github）开源的一个应用软件。提供一个将自己的GitHub实例设置为虚拟设备，从而提供可扩展，易于管理的平台。 GitHub Enterprise Server 存在安全漏洞，该漏洞源于UI错误描述。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitHub GitHub Enterprise Server 3.0 ~ 3.0.7 -

II. Public POCs for CVE-2021-22866

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III. Intelligence Information for CVE-2021-22866

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Other References for CVE-2021-22866 (2)

IV. Related Vulnerabilities

Same product: GitHub Enterprise Server
Same vendor: GitHub
Same weakness: CWE-451

V. Comments for CVE-2021-22866

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