{"id":"CVE-2020-10517","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-10517","generatedAt":"2026-10-27T22:33:01.325Z","title":"An improper access control vulnerability was identified in GitHub Enterprise Server that allowed authenticated users of the instance to determine the names of unauthorized private repositories given their numerical IDs.","description":"An improper access control vulnerability was identified in GitHub Enterprise Server that allowed authenticated users of the instance to determine the names of unauthorized private repositories given their numerical IDs. This vulnerability did not allow unauthorized access to any repository content besides the name. This vulnerability affected all versions of GitHub Enterprise Server prior to 2.22 and was fixed in versions 2.21.6, 2.20.15, and 2.19.21. This vulnerability was reported via the GitHub Bug Bounty program.","published":"2020-08-27T22:15:10.000Z","lastModified":"2026-06-17T02:47:57.000Z","status":"Modified","sourceIdentifier":"product-cna@github.com","cvss":{"version":"3.1","score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-285"],"affected":["github/github"],"epss":{"score":0.0105,"percentile":0.64033,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.05%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://enterprise.github.com/releases/2.19.21/notes","tags":["Release Notes","Vendor Advisory"],"source":"product-cna@github.com"},{"url":"https://enterprise.github.com/releases/2.20.15/notes","tags":["Release Notes","Vendor Advisory"],"source":"product-cna@github.com"},{"url":"https://enterprise.github.com/releases/2.21.6/notes","tags":["Release Notes","Vendor Advisory"],"source":"product-cna@github.com"},{"url":"https://enterprise.github.com/releases/2.19.21/notes","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://enterprise.github.com/releases/2.20.15/notes","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://enterprise.github.com/releases/2.21.6/notes","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-10517","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}