Vulnerability record · CVE-2020-10516 · published 3 June 2020

CVE-2020-10516: Github improper authorization vulnerability

Github · Github

An improper access control vulnerability was identified in the GitHub Enterprise Server API that allowed an organization member to escalate permissions and gain access to unauthorized repositories within an organization. This vulnerability affected all versions of GitHub Enterprise Server prior to 2.21 and was fixed in 2.20.9, 2.19.15, and 2.18.20. This vulnerability was reported via the GitHub Bug Bounty program.

9.8 CVSS 3.1 Critical EPSS 1.6% · top 25.3% CWE-285 · Improper authorizationCWE-552 · CWE-552

9.8CVSS 3.1 base score, v2 7.5

1.6%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References

17 Jun 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Github Github

References

Link	Tags
https://enterprise.github.com/releases/2.18.20/notes	Release NotesThird Party Advisory
https://enterprise.github.com/releases/2.19.15/notes	Release NotesThird Party Advisory
https://enterprise.github.com/releases/2.20.9/notes	Release NotesThird Party Advisory
https://enterprise.github.com/releases/2.18.20/notes	Release NotesThird Party Advisory
https://enterprise.github.com/releases/2.19.15/notes	Release NotesThird Party Advisory
https://enterprise.github.com/releases/2.20.9/notes	Release NotesThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2017-18365Github deserialization of untrusted data vulnerabilityThe Management Console in GitHub Enterprise 2.8.x before 2.8.7 has a deserialization issue that allows unauthenticated remote attackers to execute ar…EPSS 21%28 Mar 2019 8.8CVE-2020-10519Github command injection vulnerabilityA remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-cont…EPSS 3.1%3 Mar 2021 8.8CVE-2020-10518Github command injection vulnerabilityA remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-cont…EPSS 3.7%27 Aug 2020 8.1CVE-2021-22863Github improper authorization vulnerabilityAn improper access control vulnerability was identified in the GitHub Enterprise Server GraphQL API that allowed authenticated users of the instance …EPSS 1.0%3 Mar 2021 7.5CVE-2012-2055Github improper control of dynamically-managed code vulnerabilityGitHub Enterprise before 20120304 does not properly restrict the use of a hash to provide values for a model's attributes, which allows remote attack…EPSS 1.8%5 Apr 2012 6.5CVE-2021-22861Github improper authorization vulnerabilityAn improper access control vulnerability was identified in GitHub Enterprise Server that allowed authenticated users of the instance to gain write ac…EPSS 0.95%3 Mar 2021 6.5CVE-2021-22862Github improper authorization vulnerabilityAn improper access control vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with the ability to fork a rep…EPSS 0.84%3 Mar 2021 4.3CVE-2020-10517Github improper authorization vulnerabilityAn improper access control vulnerability was identified in GitHub Enterprise Server that allowed authenticated users of the instance to determine the…EPSS 1.1%27 Aug 2020

Source: NIST National Vulnerability Database (record CVE-2020-10516), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.