CVE-2021-22865
An improper access control vulnerability was identified in GitHub Enterprise Server that allowed access tokens generated from a GitHub App's web authentication flow to read private repository metadata via the REST API without having been granted the…
Does this matter?
Lower severity and a low EPSS score (1.32%). Track it; it rarely justifies an emergency change on its own.
Description
An improper access control vulnerability was identified in GitHub Enterprise Server that allowed access tokens generated from a GitHub App's web authentication flow to read private repository metadata via the REST API without having been granted the appropriate permissions. 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. The private repository metadata returned would be limited to repositories owned by the user the token identifies. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.0.4 and was fixed in versions 3.0.4, 2.22.10, 2.21.18. This vulnerability was reported via the GitHub Bug Bounty program.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- EPSS
- 1.32% probability · 69th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-285
- Affected
- github/enterprise server
- Source
- product-cna@github.com
References
- https://docs.github.com/en/enterprise-server%402.21/admin/release-notes#2.21.18
- https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.10
- https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.4
- https://docs.github.com/en/enterprise-server%402.21/admin/release-notes#2.21.18
- https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.10
- https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.4
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.