CVE-2021-22865

Improper access control in GitHub Enterprise Server leading to unauthorized read access to private repository metadata

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.23%
Affected: GitHub GitHub Enterprise Server
Published at:
Updated at:

References

Link Tags
https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.4
https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.10
https://docs.github.com/en/enterprise-server%402.21/admin/release-notes#2.21.18

Frequently Asked Questions

What is the severity of CVE-2021-22865?
CVE-2021-22865 has been scored as a medium severity vulnerability.
How to fix CVE-2021-22865?
To fix CVE-2021-22865, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-22865 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-22865 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-22865?
CVE-2021-22865 affects GitHub GitHub Enterprise Server.
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