CVE-2020-17519

HIGHNVD 7.59.0▲
EchelonGraph scoreMEDIUM confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2024-05-23), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, nvd
Exploited in the wild
7.5
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 98%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
9.0(medium)
EPSS
99.9%
KEV
⚠ Exploited

Published

January 5, 2021

Last Modified

October 27, 2025

Advisory Details (9)

Auto-updated Jun 4, 2026
No patch confirmed yet.
generic
https://lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68fc88e9038235598bde3b50d%40%3Cannounce.apache.org%3E
generic
https://lists.apache.org/thread.html/r4e1b72bfa789ea5bc20b8afe56119200ed25bdab0eb80d664fa5bfe2%40%3Cdev.flink.apache.org%3E
generic
https://lists.apache.org/thread.html/r2fc60b30557e4a537c2a6293023049bd1c49fd92b518309aa85a0398%40%3Cissues.flink.apache.org%3E
generic
https://lists.apache.org/thread.html/r28f17e564950d663e68cc6fe75756012dda62ac623766bb9bc5e7034%40%3Cissues.flink.apache.org%3E
generic
https://lists.apache.org/thread.html/r26fcdd4fe288323006253437ebc4dd6fdfadfb5e93465a0e4f68420d%40%3Cuser-zh.flink.apache.org%3E
generic
https://lists.apache.org/thread.html/r229167538863518738e02f4c1c5a8bb34c1d45dadcc97adf6676b0c1%40%3Cdev.flink.apache.org%3E
generic
https://lists.apache.org/thread.html/r1125f3044a0946d1e7e6f125a6170b58d413ebd4a95157e4608041c7%40%3Cannounce.apache.org%3E
generic
https://lists.apache.org/thread.html/r0a433be10676f4fe97ca423d08f914e0ead341c901216f292d2bbe83%40%3Cissues.flink.apache.org%3E
generic

oss-security - [CVE-2020-17519] Apache Flink directory traversal attack: reading remote files through the REST API

http://www.openwall.com/lists/oss-security/2021/01/05/2

Affected Packages

(2 across 1 ecosystem)
Maven(2)
PackageVulnerable rangeFixed inDependents
org.apache.flink:flink-runtime_2.111.11.0, 1.11.1, 1.11.21.11.3—
org.apache.flink:flink-runtime_2.121.11.0, 1.11.1, 1.11.21.11.3—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 49× in last 7d / 215× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 310 total refreshes for this CVE.

  1. 2026-07-11 19:34 UTCEG score recompute
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Publicly available exploits

(7 references)

Working exploit code is in the public domain (1 Metasploit module) (4 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCMrCl0wnLab/SimplesApachePathTraversal
    First seen Oct 13, 2021

    Tool check: CVE-2021-41773, CVE-2021-42013, CVE-2020-17519

    Open source ↗
  • GitHub PoCmurataydemir/CVE-2020-17519
    First seen Jan 10, 2021

    [CVE-2020-17519] Apache Flink RESTful API Arbitrary File Read

    Open source ↗
  • Exploit-DBEDB-49398✓ verified
    First seen Jan 8, 2021

    Apache Flink 1.11.0 - Unauthenticated Arbitrary File Read (Metasploit)

    Open source ↗
  • GitHub PoCB1anda0/CVE-2020-17519
    First seen Jan 6, 2021

    Apache Flink 目录遍历漏洞批量检测 (CVE-2020-17519)

    Open source ↗
  • GitHub PoCdolevf/apache-flink-directory-traversal.nse
    First seen Jan 6, 2021

    Apache Flink Directory Traversal (CVE-2020-17519) Nmap NSE Script

    Open source ↗
  • Metasploitauxiliary/scanner/http/apache_flink_jobmanager_traversal✓ verified
    First seen Jan 5, 2021

    Apache Flink JobManager Traversal

    Open source ↗
  • Nucleihttp/cves/2020/CVE-2020-17519.yaml
    First seen Jan 1, 2020

    Apache Flink - Local File Inclusion

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2020-17519?
CVE-2020-17519 is a high vulnerability published on January 5, 2021. 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…
When was CVE-2020-17519 disclosed?
CVE-2020-17519 was first published in the National Vulnerability Database on January 5, 2021, with the most recent update on October 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-17519 actively exploited?
Yes. CISA added CVE-2020-17519 to the Known Exploited Vulnerabilities catalog on May 23, 2024, affecting Apache Flink. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-17519?
CVE-2020-17519 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2020-17519?
CVE-2020-17519 affects Apache Flink. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2020-17519?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-17519, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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