CVE-2020-10516

Name: CVE-2020-10516
Creator: NVD / NIST
Published: 2020-06-03T14:15:12.377+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.59%

Last modified Jun 17, 2026

CVE-2020-10516 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 1.59% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.59%

72.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Github	Github	>= 2.18.0, < 2.18.20
Github	Github	>= 2.19.0, < 2.19.15
Github	Github	>= 2.20.0, < 2.20.9

References

https://enterprise.github.com/releases/2.18.20/notesRelease Notes, Third Party Advisory
https://enterprise.github.com/releases/2.19.15/notesRelease Notes, Third Party Advisory
https://enterprise.github.com/releases/2.20.9/notesRelease Notes, Third Party Advisory
https://enterprise.github.com/releases/2.18.20/notesRelease Notes, Third Party Advisory
https://enterprise.github.com/releases/2.19.15/notesRelease Notes, Third Party Advisory
https://enterprise.github.com/releases/2.20.9/notesRelease Notes, Third Party Advisory

Timeline

Published: Jun 3, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10516?

How severe is CVE-2020-10516?

CVE-2020-10516 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.59% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10516?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-10516?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST