CVE-2023-23763 Information disclosure in GitHub Enterprise Server leading to private repository leakage

What is CVE-2023-23763?

CVE-2023-23763 is a medium-severity missing authorization vulnerability in Github Enterprise Server, published on 1 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An authorization/sensitive information disclosure vulnerability was identified in GitHub Enterprise Server that allowed a fork to retain read access to an upstream repository after its visibility was changed to private. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.10.0 and was fixed in versions 3.9.4, 3.8.9, 3.7.16 and 3.6.18. This vulnerability was reported via the GitHub Bug Bounty program.

Weakness: CWE-862, CWE-200

Which versions are affected by CVE-2023-23763?

It affects 1 product.

Products include Github Enterprise Server.

How do I fix CVE-2023-23763?

No fix has been published for CVE-2023-23763 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2023-23763 being exploited?

There is no known exploitation of CVE-2023-23763 in the wild and no public exploit code.

Other vulnerabilities in Github Enterprise Server

• CVE-2024-4985 Auth bypass in Enterprise Server Critical 10.0
• CVE-2022-23739 Missing authorization in GitHub Enterprise Server Critical 9.8
• CVE-2022-46255 Improper Limitation of a Pathname to a Restricted Directory in GitHub Enterprise Server leading to RCE Critical 9.8
• CVE-2021-22869 Improper access control in GitHub Enterprise Server allows self-hosted runners to execute outside their control group Critical 9.8
• CVE-2024-9487 Auth bypass in Enterprise Server Critical 9.5

All Github Enterprise Server vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-3rw4-472r-hwgm.