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flat vulnerable to Prototype Pollution

Critical severity GitHub Reviewed Published Dec 25, 2022 to the GitHub Advisory Database • Updated Jan 29, 2023

Package

npm flat (npm)

Affected versions

< 5.0.1

Patched versions

5.0.1

Description

flat helps flatten/unflatten nested Javascript objects. A vulnerability, which was classified as critical, was found in hughsk flat up to 5.0.0. This affects the function unflatten of the file index.js. The manipulation leads to improperly controlled modification of object prototype attributes ('prototype pollution'). It is possible to initiate the attack remotely. Upgrading to version 5.0.1 can address this issue. The name of the patch is 20ef0ef55dfa028caddaedbcb33efbdb04d18e13. It is recommended to upgrade the affected component. The identifier VDB-216777 was assigned to this vulnerability.

References

Published by the National Vulnerability Database Dec 25, 2022
Published to the GitHub Advisory Database Dec 25, 2022
Reviewed Dec 30, 2022
Last updated Jan 29, 2023

Severity

Critical
9.8
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CVE ID

CVE-2020-36632

GHSA ID

GHSA-2j2x-2gpw-g8fm

Source code

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