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01 Record

CVE-2020-17519

Apache Flink directory traversal attack: reading remote files through the REST API

CriticalKEVPUBLISHEDCNA: apache
CNA base score9.1 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
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02 Description

Apache Flink directory traversal attack: reading remote files through the REST API

03 Exploitation and scoring

Exploitation
Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2024-05-23. Federal remediation due 2024-06-13.
SSVC decision
  • ExploitationactiveCISA reports credible evidence of active exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
97.80% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 99.9% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD analysis status
Analyzed. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-01-05 11:40Z5 YR AGO
Last updated
2025-10-21 23:35Z1 YR AGO
Reserved
2020-08-12
Assigning CNA
apache
Record state
PUBLISHED
Severity
Critical (CVSS 9.1)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weaknesses
  • CWE-552Files or Directories Accessible to External PartiesBase
Data version
5.1
Document digest
4f17bfe79155afce50864e02c33d8a7e5b780adc6da4f7a6e118c603ca59d009

05 Affected products

VendorProductVersionsPlatforms
Apache Software FoundationApache FlinkApache Flink 1.11.0 to 1.11.2—
apacheflink1.11.0 to 1.11.2—

06 References