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CVE-2021-41598

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 t…

Published Jan 25, 2022CWE-451EPSS 1.15%

Overview

CVE-2021-41598 is a high-severity vulnerability. It was published on January 25, 2022 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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 if the user later updated the set of repositories the app was installed on after the GitHub App had configured additional user-level permissions, those additional permissions would not be displayed, leading to more permissions being granted than the user potentially intended. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.3 and was fixed in versions 3.2.5, 3.1.13, 3.0.21. This vulnerability was reported via the GitHub Bug Bounty program.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubdocs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.21GitHubdocs.github.com/en/enterprise-server%403.1/admin/release-notes#3.1.13GitHubdocs.github.com/en/enterprise-server%403.2/admin/release-notes#3.2.5GitHubdocs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.21GitHubdocs.github.com/en/enterprise-server%403.1/admin/release-notes#3.1.13GitHubdocs.github.com/en/enterprise-server%403.2/admin/release-notes#3.2.5

How CyberStrike helps

Frequently asked questions

What is CVE-2021-41598?

CVE-2021-41598 is a high-severity vulnerability. It was published on January 25, 2022 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2021-41598?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-41598?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-41598?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-41598 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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