CVE-2021-22868
A path traversal vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site.
Does this matter?
Lower severity and a low EPSS score (0.93%). Track it; it rarely justifies an emergency change on its own.
Description
A path traversal vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration options used by GitHub Pages were not sufficiently restricted and made it possible to read files on the GitHub Enterprise Server instance. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.1.8 and was fixed in 3.1.8, 3.0.16, and 2.22.22. This vulnerability was reported via the GitHub Bug Bounty program. This is the result of an incomplete fix for CVE-2021-22867.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.93% probability · 60th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-77, CWE-22
- Affected
- github/enterprise server
- Source
- product-cna@github.com
EPSS 0.9% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.22
- https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.16
- https://docs.github.com/en/enterprise-server%403.1/admin/release-notes#3.1.8
- https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.22
- https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.16
- https://docs.github.com/en/enterprise-server%403.1/admin/release-notes#3.1.8
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.