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CVE-2022-23733: Stored XSS vulnerability in GitHub Enterprise Server leading to injection of arbitrary attributes

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-08-02 · updated 2026-06-17
• Weakness: CWE-79

Description

A stored XSS vulnerability was identified in GitHub Enterprise Server that allowed the injection of arbitrary attributes. This injection was blocked by Github's Content Security Policy (CSP). This vulnerability affected all versions of GitHub Enterprise Server prior to 3.6 and was fixed in versions 3.3.11, 3.4.6 and 3.5.3. This vulnerability was reported via the GitHub Bug Bounty program.

Affected products

• GitHub Enterprise Server: from 3.3.0 before 3.3.11; from 3.4.0 before 3.4.6; from 3.5.0 before 3.5.3 — fixed in 3.3.11, 3.4.6, 3.5.3

How to fix

Upgrade to a fixed version: GitHub Enterprise Server 3.3.11, 3.4.6, 3.5.3. Check the vendor advisory for mitigations.

References

• https://docs.github.com/en/enterprise-server%403.3/admin/release-notes#3.3.11
• https://docs.github.com/en/enterprise-server%403.4/admin/release-notes#3.4.6
• https://docs.github.com/en/enterprise-server%403.5/admin/release-notes#3.5.3
• https://docs.github.com/en/enterprise-server%403.3/admin/release-notes#3.3.11
• https://docs.github.com/en/enterprise-server%403.4/admin/release-notes#3.4.6
• https://docs.github.com/en/enterprise-server%403.5/admin/release-notes#3.5.3

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