CVE-2020-17519
HIGHCISA KEVEPSS 100th pctlDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Exploit Intelligence
Very high risk: more likely to be exploited than 100% of all known CVEs.
Apache Flink Improper Access Control Vulnerability
Apache Flink contains an improper access control vulnerability that allows an attacker to read any file on the local filesystem of the JobManager through its REST interface.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Remediation due: 2024-06-13
References
Related Vulnerabilities
Other CWE-552 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2025-11371 | High | 7.5 | 92% | KEV | Fix |
| CVE-2023-50164 | Critical | 9.8 | 81% | - | Fix |
| CVE-2016-3715 | Medium | 5.5 | 75% | KEV | Fix |
| CVE-2020-15175 | High | 7.4 | 71% | - | Fix |
| CVE-2021-39316 | High | 7.5 | 66% | - | - |
| CVE-2017-14942 | Critical | 9.8 | 61% | - | - |
Common questions
How do I fix CVE-2020-17519?
Upgrade flink to 1.11.3 or later.
Is CVE-2020-17519 being actively exploited?
Yes. CVE-2020-17519 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. US federal agencies were required to remediate it by 2024-06-13. Treat it as a priority whatever its CVSS score says.
How severe is CVE-2020-17519?
CVE-2020-17519 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2020-17519 affect?
Published advisories record a fix for flink (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2020-17519
Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-27.