CVE-2020-10516

Improper access control in GitHub Enterprise Server leading to privilege escalation of organization member

CRITICAL

9.8

CVSS Score

Published: June 3, 2020 at 01:31 PM UTC

Updated: June 17, 2026 at 02:47 AM UTC

2 products affected across 1 vendorGitHubGitHub Enterprise Server

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Severity

CRITICAL9.8

Exploit prediction

EPSS 2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

GitHub · GitHub

95%

2.18.0 ≤ v < 2.18.202.19.0 ≤ v < 2.19.152.20.0 ≤ v < 2.20.9

Affected range stops below 2.18.20, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.19.15, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.20.9, so it looks safe — our inference, not a vendor statement

GitHub Enterprise Server · GitHubgithub-action

60%

2.18 ≤ v < 2.18.202.19 ≤ v < 2.19.152.20 ≤ v < 2.20.92.18 2.19 2.20

Affected range stops below 2.18.20, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.19.15, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.20.9, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

x_refsource_MISCRelease NotesThird Party Advisory

Source: [email protected]

https://enterprise.github.com/releases/2.18.20/notes

x_refsource_MISCRelease NotesThird Party Advisory

Source: [email protected]

https://enterprise.github.com/releases/2.19.15/notes

x_refsource_MISCRelease NotesThird Party Advisory

Source: [email protected]

https://enterprise.github.com/releases/2.20.9/notes

CVSS

9.8CRITICAL[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-285CWE-552

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