How severe is CVE-2020-10519?

CVE-2020-10519 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-10519 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-10519?

CVE-2020-10519 affects Github. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-10519?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-10519 published?

CVE-2020-10519 was published on 2021-03-03 and last updated on 2026-06-17.

CVE-2020-10519

CVE-2020-10519 is a high-severity vulnerability in Github with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Github
Published: 2021-03-03
Last modified: 2026-06-17

Description

A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration of the underlying parsers used by GitHub Pages were not sufficiently restricted and made it possible to execute commands on the GitHub Enterprise Server instance. 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 2.22.7 and was fixed in 2.22.7, 2.21.15, and 2.20.24. The underlying issues contributing to this vulnerability were identified through the GitHub Security Bug Bounty program.

Frequently asked questions

What is CVE-2020-10519?: A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration of the underlying parsers used by GitHub Pages were not sufficiently restricted and made it possible to execute commands on the GitHub Enterprise Server instance. 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 2.22.7 and was fixed in 2.22.7, 2.21.15, and 2.20.24. The underlying issues contributing to this vulnerability were identified through the GitHub Security Bug Bounty program.
How severe is CVE-2020-10519?: CVE-2020-10519 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-10519 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-10519?: CVE-2020-10519 affects Github. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-10519?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-10519 published?: CVE-2020-10519 was published on 2021-03-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:github:github:*:*:*:*:enterprise:*:*:*

More vulnerabilities in Github

CVE-2020-10516 — Critical (CVSS 9.8): An improper access control vulnerability was identified in the GitHub Enterprise Server API that allowed an…
CVE-2017-18365 — Critical (CVSS 9.8): The Management Console in GitHub Enterprise 2.8.x before 2.8.7 has a deserialization issue that allows unauthenticated…
CVE-2020-10518 — High (CVSS 8.8): A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building…
CVE-2021-22863 — High (CVSS 8.1): An improper access control vulnerability was identified in the GitHub Enterprise Server GraphQL API that allowed…
CVE-2012-2055 — High (CVSS 7.5): GitHub Enterprise before 20120304 does not properly restrict the use of a hash to provide values for a model's…
CVE-2021-22862 — Medium (CVSS 6.5): An improper access control vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user…

All CVEs affecting Github →

Other CWE-77 (Command Injection) vulnerabilities

CVE-2026-23652 — Critical (CVSS 10.0): Improper neutralization of special elements used in a command ('command injection') in Microsoft Power Pages allows an…
CVE-2025-59818 — Critical (CVSS 10.0): This vulnerability allows authenticated attackers to execute arbitrary commands on the underlying system using the file…
CVE-2025-64093 — Critical (CVSS 10.0): Remote Code Execution vulnerability that allows unauthenticated attackers to inject arbitrary commands into the…
CVE-2025-64090 — Critical (CVSS 10.0): This vulnerability allows authenticated attackers to execute commands via the hostname of the device.
CVE-2025-61492 — Critical (CVSS 10.0): A command injection vulnerability in the execute_command function of terminal-controller-mcp 0.1.7 allows attackers to…
CVE-2025-10035 — Critical (CVSS 10.0): A deserialization vulnerability in the License Servlet of Fortra's GoAnywhere MFT allows an actor with a validly forged…

Browse all CWE-77 (Command Injection) vulnerabilities →