PT-2021-10096

CVE-2020-17518

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Published

2021-01-05

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Updated

2026-10-29

Description by

CVSS 3.1
7.5
High
MetricsAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Name of the Vulnerable Software and Affected Versions: Apache Flink versions 1.5.1
Description: A REST handler in Apache Flink allows writing an uploaded file to any location on the local file system through a maliciously modified HTTP HEADER. This issue enables files to be written to any location accessible by the software.
Recommendations: For Apache Flink version 1.5.1, upgrade to Flink 1.11.3 or 1.12.0, especially if the Flink instance is exposed.
Exploitability
Exploit
Fix
Impacts
Researchers
Vendors
Affected products
Weakness enumeration
CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\'Path Traversal\')
CWE-23: Relative Path Traversal
Related identifiers
CVE-2020-17518
GHSA-7Q5G-GPH2-4RC6
BIT-FLINK-2020-17518
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