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CVE-2021-22870

6.5 · MEDIUM

A path traversal vulnerability was identified in GitHub Pages builds on GitHub Enterprise Server that could allow an attacker to read system files.

Published Nov 10, 2021CWE-23EPSS 1.13%

Overview

CVE-2021-22870 is a medium-severity vulnerability. It was published on November 10, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

A path traversal vulnerability was identified in GitHub Pages builds on GitHub Enterprise Server that could allow an attacker to read system files. 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 3.3 and was fixed in versions 3.0.19, 3.1.11, and 3.2.3. This vulnerability was reported via the GitHub Bug Bounty program.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubdocs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.19GitHubdocs.github.com/en/enterprise-server%403.1/admin/release-notes#3.1.11GitHubdocs.github.com/en/enterprise-server%403.2/admin/release-notes#3.2.3GitHubdocs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.19GitHubdocs.github.com/en/enterprise-server%403.1/admin/release-notes#3.1.11GitHubdocs.github.com/en/enterprise-server%403.2/admin/release-notes#3.2.3

How CyberStrike helps

Frequently asked questions

What is CVE-2021-22870?

CVE-2021-22870 is a medium-severity vulnerability. It was published on November 10, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2021-22870?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-22870?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-22870?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-22870 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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