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Express-FileUpload Arbitrary File Overwrite

High severity GitHub Reviewed Published Apr 13, 2022 to the GitHub Advisory Database • Updated Oct 19, 2023

Package

npm express-fileupload (npm)

Affected versions

<= 1.3.1

Patched versions

None

Description

An arbitrary file write vulnerability in Express-FileUpload v1.3.1 allows attackers to upload multiple files with the same name, causing an overwrite of files in the web application server. This vulnerability is debated by the package author.

References

Published by the National Vulnerability Database Apr 12, 2022
Published to the GitHub Advisory Database Apr 13, 2022
Reviewed Oct 19, 2023
Last updated Oct 19, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS score

0.088%
(39th percentile)

Weaknesses

CVE ID

CVE-2022-27261

GHSA ID

GHSA-w4m6-x6c2-j5c9

Source code

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