Low severity · published Aug 26, 2025
CVE-2025-8447
Incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed read-only access
3.1
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 24% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ES
Enterprise Server · GitHub
3.14 through 3.14.16; 3.15 through 3.15.11; 3.16 through 3.16.7; 3.17 through 3.17.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-8447
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-8447
Release Notes
https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.17
Release Notes
https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.12
Release Notes
https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.8
Release Notes
https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.5
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