CVE-2020-17519

mediumpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.978 · 100 %ileexploit · functionalEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 16 exploits · functional

Likely / severe?

97.8% (100th) EPSS

CVSS 5 · medium

Is it mine?

7 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · osv

added 2024-05-23remediate by 2024-06-13

required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

EPSS · scored 2026-10-22

Apache Flink Improper Access Control Vulnerability

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

Technical severity, 0–10. One row per scoring source.

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 5–9.1

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.19.1criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Hsecondary · ENISA EU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Hsecondaryexploitability 3.9 · impact 5.2

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Hsecondary · OSV

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-552USprimaryCWE-22USCWE-552USCWE-552US

exploits (16)

Public proof-of-concept and weaponised exploit code.

EDB-49398Apache Flink 1.11.0 - Unauthenticated Arbitrary File Read (Metasploit)functional · exploit_db
auxiliary/scanner/http/apache_flink_jobmanager_traversalApache Flink JobManager Traversalfunctional · metasploit
B1anda0/CVE-2020-17519Apache Flink 目录遍历漏洞批量检测 (CVE-2020-17519)PoC · poc_in_github
CyberCTF/vulhub-flink-cve-2020-17519Vulhub flink/CVE-2020-17519: Apache Flink JobManager Directory Traversal (CVE-2020-17519), run with IsoloomPoC · poc_in_github
GazettEl/CVE-2020-17519GazettEl/CVE-2020-17519PoC · poc_in_github
MrCl0wnLab/SimplesApachePathTraversalTool check: CVE-2021-41773, CVE-2021-42013, CVE-2020-17519PoC · poc_in_github

affected products (7)

Products and version ranges known to be affected.

Apache Software Foundation Apache Flink≤ Apache Flink 1.11.0 to 1.11.2enisa_euvdEU
Apache Software Foundation Flink≤ 1.12.0fstec_bduRU
Apache Software Foundation Flink≤ 1.11.3fstec_bduRU
apache flink1.11.0 → 1.11.3nvdUScpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*
Bitnami flink1.11.0 → 1.11.3osvUSpkg:bitnami/flink
Maven org.apache.flink:flink-runtime_2.111.11.0 → 1.11.3osvUSpkg:maven/org.apache.flink/flink-runtime_2.11
Maven org.apache.flink:flink-runtime_2.121.11.0 → 1.11.3osvUSpkg:maven/org.apache.flink/flink-runtime_2.12

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-395w-qhqr-9fr6Path Traversal in Apache Flink2021-01-06ghsa · osvUS
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.
BIT-flink-2020-17519Apache Flink directory traversal attack: reading remote files through the REST API2024-03-06vendor · osvUS
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.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv nvd NVD CVE.org MITRE

published 2021-01-05modified 2026-06-17

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Related entries.

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references (52)

External citations — patches, advisories, analysis.

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