{"id":"CVE-2020-17519","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-17519","generatedAt":"2026-10-28T05:27:01.907Z","title":"Apache Flink Improper Access Control Vulnerability","description":"A change introduced in Apache Flink 1.11.0 (and released in 1.11.1 and 1.11.2 as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process. Access is restricted to files accessible by the JobManager process. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit b561010b0ee741543c3953306037f00d7a9f0801 from apache/flink:master.","published":"2021-01-05T12:15:13.000Z","lastModified":"2026-06-17T02:59:04.000Z","status":"Analyzed","sourceIdentifier":"security@apache.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-552"],"affected":["apache/flink"],"epss":{"score":0.97809,"percentile":0.99905,"date":"2026-10-27","history":[]},"kev":{"listed":true,"dateAdded":"2024-05-23","dueDate":"2024-06-13","knownRansomwareCampaignUse":"Unknown","notes":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.\nThis vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://lists.apache.org/thread/typ0h03zyfrzjqlnb7plh64df1g2383d; https://nvd.nist.gov/vuln/detail/CVE-2020-17519"},"exploits":{"count":1,"verified":true,"firstPublished":"2021-01-08","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":49398,"kind":"exploit","title":"Apache Flink 1.11.0 - Unauthenticated Arbitrary File Read (Metasploit)","url":"https://www.exploit-db.com/exploits/49398","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/java/webapps/49398.rb","file":"exploits/java/webapps/49398.rb","published":"2021-01-08","added":"2021-01-08","updated":"2021-01-08","author":"SunCSR Team","type":"webapps","platform":"java","port":null,"verified":true,"codes":["CVE-2020-17519"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 13 June 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/160849/Apache-Flink-1.11.0-Arbitrary-File-Read-Directory-Traversal.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2021/01/05/2","tags":["Mailing List","Third Party Advisory"],"source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r0a433be10676f4fe97ca423d08f914e0ead341c901216f292d2bbe83%40%3Cissues.flink.apache.org%3E","tags":["Mailing List"],"source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r1125f3044a0946d1e7e6f125a6170b58d413ebd4a95157e4608041c7%40%3Cannounce.apache.org%3E","tags":["Mailing List"],"source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r229167538863518738e02f4c1c5a8bb34c1d45dadcc97adf6676b0c1%40%3Cdev.flink.apache.org%3E","tags":["Issue 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Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-17519","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."}