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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
5.9
/ 10

CVSS base metrics

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

Weaknesses

CVE ID

CVE-2020-36321

GHSA ID

GHSA-49r2-73m6-pp8f

Source code

No known source code
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