RCE in GitHub

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.

Vulnerability class: Command Injection (OS Command Injection)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.031 (87.3th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2020-10519: held from 0.030 to 0.031.

EPSS over last 30 days · oldest: 0.030 · newest: 0.031 · change: +0.001

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2020-10519?
CVE-2020-10519 is a high-severity vulnerability in GitHub, classified under Command Injection. CVSS score: 8.8/10. Published 2021-03-03.
How severe is CVE-2020-10519?
High severity. CVSS v3 base score is 8.8 out of 10.