CVE-2020-17519

CRITICALNVD 7.59.0▲
EchelonGraph scoreHIGH 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
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 98%CVSS: 7.5Exploit: cisa kev · ssvc active · Metasploit · Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed services: Not assessed

A fix is available — apply it.

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
9.0CRITICALhigh confidence
EG Risk
96
EG Risk 96/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability100% × 15%
CISA SSVC: Attend at low or medium mission impact; Act at high (mission-essential systems).
Action: A fix is available. Apply it sooner than your standard update timelines at low or medium mission impact and as soon as possible at high.
EPSS PROB
98%
EPSS %ILE
99th
KEV
⚠ Exploited

CISA SSVCAttend at low or medium mission impact; Act at high (mission-essential systems).

A fix is available. Apply it sooner than your standard update timelines at low or medium mission impact and as soon as possible at high.

Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

January 5, 2021

Last Modified

October 27, 2025

Advisory Details (9)

Auto-updated Jun 4, 2026
Patch available.
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 rangeFix by version rangeDependents
org.apache.flink:flink-runtime_2.111.11.0, 1.11.1, 1.11.2
  • 1.11.0 up to 1.11.3: fixed in 1.11.3
—
org.apache.flink:flink-runtime_2.121.11.0, 1.11.1, 1.11.2
  • 1.11.0 up to 1.11.3: fixed in 1.11.3
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 0× in last 7d / 31× 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 124 total refreshes for this CVE.

  1. 2026-10-02 17:26 UTCEG score recompute
  2. 2026-10-02 16:22 UTCEPSS rescore
  3. 2026-09-28 22:51 UTCEG score recompute
  4. 2026-09-27 21:51 UTCCISA KEV update
  5. 2026-09-26 16:33 UTCEG score recompute
  6. 2026-09-26 15:54 UTCEPSS rescore
  7. 2026-09-25 19:35 UTCCISA KEV update
  8. 2026-09-25 14:55 UTCCISA KEV update
  9. 2026-09-24 19:31 UTCCISA KEV update
  10. 2026-09-24 17:27 UTCEG score recompute
  11. 2026-09-24 14:00 UTCEPSS rescore
  12. 2026-09-24 14:00 UTCEPSS rescore
  13. 2026-09-22 19:36 UTCCISA KEV update
  14. 2026-09-22 14:54 UTCEG score recompute
  15. 2026-09-22 14:43 UTCEPSS rescore
  16. 2026-09-21 20:48 UTCEG score recompute
  17. 2026-09-21 20:28 UTCEPSS rescore
  18. 2026-09-21 19:09 UTCCISA KEV update
  19. 2026-09-18 20:26 UTCEG score recompute
  20. 2026-09-18 19:23 UTCEPSS rescore
  21. 2026-09-18 19:20 UTCCISA KEV update
  22. 2026-09-18 14:15 UTCCISA KEV update
  23. 2026-09-16 14:10 UTCCISA KEV update
  24. 2026-09-15 05:37 UTCEG score recompute
  25. 2026-09-15 03:06 UTCEPSS rescore
Show 75 more
  1. 2026-09-15 03:06 UTCEPSS rescore
  2. 2026-09-14 19:24 UTCCISA KEV update
  3. 2026-09-12 16:11 UTCEG score recompute
  4. 2026-09-12 14:56 UTCEPSS rescore
  5. 2026-09-11 18:49 UTCCISA KEV update
  6. 2026-09-10 19:28 UTCCISA KEV update
  7. 2026-09-09 19:08 UTCCISA KEV update
  8. 2026-09-08 18:54 UTCCISA KEV update
  9. 2026-09-04 17:38 UTCCISA KEV update
  10. 2026-09-02 17:33 UTCCISA KEV update
  11. 2026-08-31 14:19 UTCCISA KEV update
  12. 2026-08-27 17:22 UTCCISA KEV update
  13. 2026-08-27 15:35 UTCEG score recompute
  14. 2026-08-27 14:21 UTCEPSS rescore
  15. 2026-08-26 17:41 UTCCISA KEV update
  16. 2026-08-24 18:52 UTCCISA KEV update
  17. 2026-08-24 15:14 UTCEG score recompute
  18. 2026-08-24 11:37 UTCEG score recompute
  19. 2026-08-21 16:49 UTCCISA KEV update
  20. 2026-08-20 17:06 UTCCISA KEV update
  21. 2026-08-19 19:34 UTCEG score recompute
  22. 2026-08-19 17:33 UTCCISA KEV update
  23. 2026-08-19 17:00 UTCEPSS rescore
  24. 2026-08-18 16:58 UTCCISA KEV update
  25. 2026-08-17 13:56 UTCCISA KEV update
  26. 2026-08-12 14:04 UTCEG score recompute
  27. 2026-08-12 13:47 UTCEPSS rescore
  28. 2026-08-11 19:32 UTCCISA KEV update
  29. 2026-08-07 17:09 UTCCISA KEV update
  30. 2026-08-05 17:25 UTCCISA KEV update
  31. 2026-08-04 17:02 UTCCISA KEV update
  32. 2026-08-03 19:22 UTCCISA KEV update
  33. 2026-07-30 18:55 UTCEG score recompute
  34. 2026-07-30 16:25 UTCEPSS rescore
  35. 2026-07-30 11:40 UTCEG score recompute
  36. 2026-07-30 04:25 UTCEG score recompute
  37. 2026-07-30 01:27 UTCEPSS rescore
  38. 2026-07-29 19:27 UTCCISA KEV update
  39. 2026-07-27 19:24 UTCCISA KEV update
  40. 2026-07-27 17:17 UTCCISA KEV update
  41. 2026-07-26 13:07 UTCEG score recompute
  42. 2026-07-26 02:15 UTCEG score recompute
  43. 2026-07-25 14:15 UTCEPSS rescore
  44. 2026-07-25 14:14 UTCEPSS rescore
  45. 2026-07-23 01:50 UTCEG score recompute
  46. 2026-07-22 22:17 UTCEG score recompute
  47. 2026-07-22 19:40 UTCCISA KEV update
  48. 2026-07-21 14:37 UTCCISA KEV update
  49. 2026-07-18 10:43 UTCEG score recompute
  50. 2026-07-18 10:02 UTCEPSS rescore
  51. 2026-07-17 09:24 UTCEG score recompute
  52. 2026-07-16 17:04 UTCCISA KEV update
  53. 2026-07-15 16:55 UTCEPSS rescore
  54. 2026-07-15 16:49 UTCCISA KEV update
  55. 2026-07-15 15:04 UTCCISA KEV update
  56. 2026-07-14 18:05 UTCCISA KEV update
  57. 2026-07-13 17:07 UTCCISA KEV update
  58. 2026-07-13 06:10 UTCEPSS rescore
  59. 2026-07-13 06:10 UTCEPSS rescore
  60. 2026-07-10 17:52 UTCCISA KEV update
  61. 2026-07-07 19:01 UTCCISA KEV update
  62. 2026-07-07 17:16 UTCCISA KEV update
  63. 2026-07-01 19:16 UTCCISA KEV update
  64. 2026-07-01 15:03 UTCEPSS rescore
  65. 2026-06-29 19:12 UTCCISA KEV update
  66. 2026-06-25 19:15 UTCCISA KEV update
  67. 2026-06-23 17:44 UTCCISA KEV update
  68. 2026-06-22 14:23 UTCEPSS rescore
  69. 2026-06-22 14:23 UTCEPSS rescore
  70. 2026-06-18 17:50 UTCEPSS rescore
  71. 2026-06-18 16:13 UTCCISA KEV update
  72. 2026-06-16 19:33 UTCCISA KEV update
  73. 2026-06-15 19:33 UTCCISA KEV update
  74. 2026-06-15 17:46 UTCEPSS rescore
  75. 2026-06-12 23:10 UTCEPSS rescore

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.

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

    Apache Flink 1.11.0 - Unauthenticated Arbitrary File Read (Metasploit)

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

    Apache Flink JobManager Traversal

    Open source ↗
  • 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 ↗
  • 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 ↗
  • 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 critical 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 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 attention. A fix is available. Apply it.
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 (CRITICAL).
Which products are affected by CVE-2020-17519?
CVE-2020-17519 affects Apache Flink. The affected packages EchelonGraph has on record, with version ranges, are listed in the Affected Packages section of this page.
How do I remediate CVE-2020-17519?
A fix for CVE-2020-17519 is available: update to the fixed version the vendor names in its advisory.

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