CVE-2025-8447 Incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed read-only access
An attacker with repository access can read limited code from other private repositories by exploiting improper access controls in diff functionality.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-8447?
CVE-2025-8447 is a high-severity missing authorization vulnerability in Github Enterprise Server, published on 26 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An improper access control vulnerability was identified in GitHub Enterprise Server that allowed users with access to any repository to retrieve limited code content from another repository by creating a diff between the repositories. To exploit this vulnerability, an attacker needed to know the name of a private repository along with its branches, tags, or commit SHAs that they could use to trigger compare/diff functionality and retrieve limited code without proper authorization. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.18, and was fixed in versions 3.14.17, 3.15.12, 3.16.8 and 3.17.5. This vulnerability was reported via the GitHub Bug Bounty program.
Weakness: CWE-639
Which versions are affected by CVE-2025-8447?
It affects 1 product.
Products include Github Enterprise Server.
How do I fix CVE-2025-8447?
No fix has been published for CVE-2025-8447 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-2025-8447 being exploited?
There is no known exploitation of CVE-2025-8447 in the wild and no public exploit code.
Other vulnerabilities in Github Enterprise Server
- CVE-2024-4985 Auth bypass in Enterprise Server
- CVE-2022-23739 Missing authorization in GitHub Enterprise Server
- CVE-2022-46255 Improper Limitation of a Pathname to a Restricted Directory in GitHub Enterprise Server leading to RCE
- CVE-2021-22869 Improper access control in GitHub Enterprise Server allows self-hosted runners to execute outside their control group
- CVE-2024-9487 Auth bypass in Enterprise Server
Sources
Also known as GHSA-rw5q-23mh-r4c3.