Skip to content

Directory traversal in development mode handler in Vaadin 14 and 15-17

Moderate severity GitHub Reviewed Published Apr 16, 2021 in vaadin/flow • Updated Feb 1, 2023

Package

maven com.vaadin:flow-server (Maven)

Affected versions

>= 3.0.0, < 5.0.0
>= 2.0.0, < 2.4.2

Patched versions

5.0.0
2.4.2

Description

Improper URL validation in development mode handler in com.vaadin:flow-server versions 2.0.0 through 2.4.1 (Vaadin 14.0.0 through 14.4.2), and 3.0 prior to 5.0 (Vaadin 15 prior to 18) allows attacker to request arbitrary files stored outside of intended frontend resources folder.

References

@fluorumlabs fluorumlabs published to vaadin/flow Apr 16, 2021
Reviewed Apr 16, 2021
Published to the GitHub Advisory Database Apr 19, 2021
Published by the National Vulnerability Database Apr 23, 2021
Last updated Feb 1, 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
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
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:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.366%
(73rd percentile)

Weaknesses

CVE ID

CVE-2020-36321

GHSA ID

GHSA-49r2-73m6-pp8f

Source code

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