Vulnerability Details CVE-2021-22863
An improper access control vulnerability was identified in the GitHub Enterprise Server GraphQL API that allowed authenticated users of the instance to modify the maintainer collaboration permission of a pull request without proper authorization. By exploiting this vulnerability, an attacker would be able to gain access to head branches of pull requests opened on repositories of which they are a maintainer. Forking is disabled by default for organization owned private repositories and would prevent this vulnerability. Additionally, branch protections such as required pull request reviews or status checks would prevent unauthorized commits from being merged without further review or validation. This vulnerability affected all versions of GitHub Enterprise Server since 2.12.22 and was fixed in versions 2.20.24, 2.21.15, 2.22.7 and 3.0.1. This vulnerability was reported via the GitHub Bug Bounty program.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 56.4%
CVSS Severity
CVSS v3 Score 8.1
CVSS v2 Score 5.5
References
- https://docs.github.com/en/enterprise-server%402.20/admin/release-notes#2.20.24
- https://docs.github.com/en/enterprise-server%402.21/admin/release-notes#2.21.15
- https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.7
- https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.1
- https://docs.github.com/en/enterprise-server%402.20/admin/release-notes#2.20.24
- https://docs.github.com/en/enterprise-server%402.21/admin/release-notes#2.21.15
- https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.7
- https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.1
Products affected by CVE-2021-22863
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cpe:2.3:a:github:github:2.12.22
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cpe:2.3:a:github:github:2.12.23
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cpe:2.3:a:github:github:2.12.24
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cpe:2.3:a:github:github:2.12.25
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cpe:2.3:a:github:github:2.13.0
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cpe:2.3:a:github:github:2.13.1
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cpe:2.3:a:github:github:2.13.10
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cpe:2.3:a:github:github:2.13.11
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cpe:2.3:a:github:github:2.13.12
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cpe:2.3:a:github:github:2.13.13
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cpe:2.3:a:github:github:2.13.14
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cpe:2.3:a:github:github:2.13.15
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cpe:2.3:a:github:github:2.13.16
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cpe:2.3:a:github:github:2.13.17
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cpe:2.3:a:github:github:2.13.18
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cpe:2.3:a:github:github:2.13.19
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cpe:2.3:a:github:github:2.13.2
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cpe:2.3:a:github:github:2.13.20
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cpe:2.3:a:github:github:2.13.21
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cpe:2.3:a:github:github:2.13.22
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cpe:2.3:a:github:github:2.13.23
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cpe:2.3:a:github:github:2.13.3
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cpe:2.3:a:github:github:2.13.4
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cpe:2.3:a:github:github:2.13.5
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cpe:2.3:a:github:github:2.13.6
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cpe:2.3:a:github:github:2.13.7
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cpe:2.3:a:github:github:2.13.8
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cpe:2.3:a:github:github:2.13.9
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cpe:2.3:a:github:github:2.14.0
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cpe:2.3:a:github:github:2.14.1
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cpe:2.3:a:github:github:2.14.10
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cpe:2.3:a:github:github:2.14.11
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cpe:2.3:a:github:github:2.14.12
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cpe:2.3:a:github:github:2.14.13
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cpe:2.3:a:github:github:2.14.14
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cpe:2.3:a:github:github:2.14.15
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cpe:2.3:a:github:github:2.14.16
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cpe:2.3:a:github:github:2.14.17
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cpe:2.3:a:github:github:2.14.18
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cpe:2.3:a:github:github:2.14.19
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cpe:2.3:a:github:github:2.14.2
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cpe:2.3:a:github:github:2.14.20
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cpe:2.3:a:github:github:2.14.21
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cpe:2.3:a:github:github:2.14.22
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cpe:2.3:a:github:github:2.14.23
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cpe:2.3:a:github:github:2.14.24
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cpe:2.3:a:github:github:2.14.25
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cpe:2.3:a:github:github:2.14.3
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cpe:2.3:a:github:github:2.14.4
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cpe:2.3:a:github:github:2.14.5
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cpe:2.3:a:github:github:2.14.6
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cpe:2.3:a:github:github:2.14.7
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cpe:2.3:a:github:github:2.14.8
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cpe:2.3:a:github:github:2.14.9
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cpe:2.3:a:github:github:2.15.0
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cpe:2.3:a:github:github:2.15.1
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cpe:2.3:a:github:github:2.15.10
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cpe:2.3:a:github:github:2.15.11
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cpe:2.3:a:github:github:2.15.12
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cpe:2.3:a:github:github:2.15.13
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cpe:2.3:a:github:github:2.15.14
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cpe:2.3:a:github:github:2.15.15
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cpe:2.3:a:github:github:2.15.16
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cpe:2.3:a:github:github:2.15.17
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cpe:2.3:a:github:github:2.15.18
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cpe:2.3:a:github:github:2.15.19
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cpe:2.3:a:github:github:2.15.2
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cpe:2.3:a:github:github:2.15.3
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cpe:2.3:a:github:github:2.15.4
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cpe:2.3:a:github:github:2.15.5
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cpe:2.3:a:github:github:2.15.6
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cpe:2.3:a:github:github:2.15.7
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cpe:2.3:a:github:github:2.15.8
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cpe:2.3:a:github:github:2.15.9
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cpe:2.3:a:github:github:2.16.0
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cpe:2.3:a:github:github:2.16.1
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cpe:2.3:a:github:github:2.16.10
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cpe:2.3:a:github:github:2.16.11
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cpe:2.3:a:github:github:2.16.12
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cpe:2.3:a:github:github:2.16.13
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cpe:2.3:a:github:github:2.16.14
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cpe:2.3:a:github:github:2.16.2
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cpe:2.3:a:github:github:2.16.3
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cpe:2.3:a:github:github:2.16.4
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cpe:2.3:a:github:github:2.16.5
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cpe:2.3:a:github:github:2.16.6
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cpe:2.3:a:github:github:2.16.7
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cpe:2.3:a:github:github:2.16.8
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cpe:2.3:a:github:github:2.16.9
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cpe:2.3:a:github:github:2.17.0
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cpe:2.3:a:github:github:2.17.1
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cpe:2.3:a:github:github:2.17.2
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cpe:2.3:a:github:github:2.17.3
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cpe:2.3:a:github:github:2.17.4
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cpe:2.3:a:github:github:2.17.5
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cpe:2.3:a:github:github:2.18.0
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cpe:2.3:a:github:github:2.18.1
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cpe:2.3:a:github:github:2.18.10
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cpe:2.3:a:github:github:2.18.11
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cpe:2.3:a:github:github:2.18.12
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cpe:2.3:a:github:github:2.18.13
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cpe:2.3:a:github:github:2.18.14
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cpe:2.3:a:github:github:2.18.15
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cpe:2.3:a:github:github:2.18.16
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cpe:2.3:a:github:github:2.18.17
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cpe:2.3:a:github:github:2.18.19
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cpe:2.3:a:github:github:2.18.2
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cpe:2.3:a:github:github:2.18.20
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cpe:2.3:a:github:github:2.18.3
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cpe:2.3:a:github:github:2.18.4
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cpe:2.3:a:github:github:2.18.5
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cpe:2.3:a:github:github:2.18.6
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cpe:2.3:a:github:github:2.18.7
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cpe:2.3:a:github:github:2.18.8
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cpe:2.3:a:github:github:2.18.9
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cpe:2.3:a:github:github:2.19.0
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cpe:2.3:a:github:github:2.19.1
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cpe:2.3:a:github:github:2.19.10
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cpe:2.3:a:github:github:2.19.11
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cpe:2.3:a:github:github:2.19.12
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cpe:2.3:a:github:github:2.19.13
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cpe:2.3:a:github:github:2.19.14
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cpe:2.3:a:github:github:2.19.15
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cpe:2.3:a:github:github:2.19.2
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cpe:2.3:a:github:github:2.19.21
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cpe:2.3:a:github:github:2.19.3
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cpe:2.3:a:github:github:2.19.4
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cpe:2.3:a:github:github:2.19.5
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cpe:2.3:a:github:github:2.19.6
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cpe:2.3:a:github:github:2.19.7
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cpe:2.3:a:github:github:2.19.8
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cpe:2.3:a:github:github:2.19.9
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cpe:2.3:a:github:github:2.20.0
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cpe:2.3:a:github:github:2.20.1
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cpe:2.3:a:github:github:2.20.10
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cpe:2.3:a:github:github:2.20.11
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cpe:2.3:a:github:github:2.20.12
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cpe:2.3:a:github:github:2.20.13
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cpe:2.3:a:github:github:2.20.14
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cpe:2.3:a:github:github:2.20.15
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cpe:2.3:a:github:github:2.20.16
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cpe:2.3:a:github:github:2.20.17
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cpe:2.3:a:github:github:2.20.18
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cpe:2.3:a:github:github:2.20.19
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cpe:2.3:a:github:github:2.20.2
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cpe:2.3:a:github:github:2.20.20
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cpe:2.3:a:github:github:2.20.21
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cpe:2.3:a:github:github:2.20.22
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cpe:2.3:a:github:github:2.20.23
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cpe:2.3:a:github:github:2.20.3
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cpe:2.3:a:github:github:2.20.4
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cpe:2.3:a:github:github:2.20.5
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cpe:2.3:a:github:github:2.20.6
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cpe:2.3:a:github:github:2.20.7
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cpe:2.3:a:github:github:2.20.8
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cpe:2.3:a:github:github:2.20.9
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cpe:2.3:a:github:github:2.21.0
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cpe:2.3:a:github:github:2.21.1
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cpe:2.3:a:github:github:2.21.10
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cpe:2.3:a:github:github:2.21.11
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cpe:2.3:a:github:github:2.21.12
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cpe:2.3:a:github:github:2.21.13
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cpe:2.3:a:github:github:2.21.14
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cpe:2.3:a:github:github:2.21.2
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cpe:2.3:a:github:github:2.21.3
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cpe:2.3:a:github:github:2.21.4
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cpe:2.3:a:github:github:2.21.5
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cpe:2.3:a:github:github:2.21.6
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cpe:2.3:a:github:github:2.21.7
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cpe:2.3:a:github:github:2.21.8
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cpe:2.3:a:github:github:2.21.9
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cpe:2.3:a:github:github:2.22.0
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cpe:2.3:a:github:github:2.22.1
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cpe:2.3:a:github:github:2.22.2
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cpe:2.3:a:github:github:2.22.3
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cpe:2.3:a:github:github:2.22.4
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cpe:2.3:a:github:github:2.22.5
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cpe:2.3:a:github:github:2.22.6
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cpe:2.3:a:github:github:3.0.0