Skip to content

Improperly Controlled Modification of Dynamically-Determined Object Attributes in express-mock-middleware

Moderate severity GitHub Reviewed Published Dec 9, 2021 to the GitHub Advisory Database • Updated Jan 27, 2023

Package

npm express-mock-middleware (npm)

Affected versions

<= 0.0.6

Patched versions

None

Description

express-mock-middleware through 0.0.6 is vulnerable to Prototype Pollution. Exported functions by the package can be tricked into adding or modifying properties of the Object.prototype. Exploitation of this vulnerability requires creation of a new directory where an attack code can be placed which will then be exported by express-mock-middleware. As such, this is considered to be a low risk.

References

Published by the National Vulnerability Database Apr 7, 2020
Reviewed May 25, 2021
Published to the GitHub Advisory Database Dec 9, 2021
Last updated Jan 27, 2023

Severity

Moderate

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
Low
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:L/A:N

EPSS score

0.091%
(40th percentile)

Weaknesses

CVE ID

CVE-2020-7616

GHSA ID

GHSA-v39h-qm32-8gwq

Source code

No known source code
Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.