Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.

CVE-2021-22864 Details

Description

A remote code execution 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 override environment variables leading to code execution 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 3.0.3 and was fixed in 3.0.3, 2.22.9, and 2.21.17. This vulnerability was reported via the GitHub Bug Bounty program.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://docs.github.com/en/enterprise-server%402.21/admin/release-notes#2.21.17	CVE
https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.9	CVE
https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.3	CVE
https://docs.github.com/en/enterprise-server%402.21/admin/release-notes#2.21.17	[email protected]
https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.9	[email protected]
https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.3	[email protected]

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information to Classify Weakness	[email protected]
CWE-77	Improper Neutralization of Special Elements used in a Command ('Command Injection')	[email protected]

Affected Products

Product	Versions
github enterprise server	>= 2.21.0, < 2.21.17 >= 2.22.0, < 2.22.9 >= 3.0.0, < 3.0.3
CPE cpe:2.3:a:github:enterprise_server:::::::: Remediation No remediation found in references.

Change History

6 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Nov 7, 2023	CVE Modified	[email protected]
Jun 30, 2023	Reanalysis	[email protected]
Mar 26, 2021	Initial Analysis	[email protected]