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Reflected cross-site scripting in development mode handler in Vaadin 14, 15-19

Low severity GitHub Reviewed Published Jun 24, 2021 in vaadin/platform • Updated Feb 1, 2023

Package

maven com.vaadin:vaadin-bom (Maven)

Affected versions

>= 14.0.0, <= 14.6.1
>= 15.0.0, <= 19.0.8

Patched versions

14.6.2
19.0.9

Description

URL encoding error in development mode handler in com.vaadin:flow-server versions 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1), 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8) allows local user to execute arbitrary JavaScript code by opening crafted URL in browser.

References

@fluorumlabs fluorumlabs published to vaadin/platform Jun 24, 2021
Published by the National Vulnerability Database Jun 24, 2021
Reviewed Jun 24, 2021
Published to the GitHub Advisory Database Jun 28, 2021
Last updated Feb 1, 2023

Severity

Low

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
Local
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
Low
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:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

EPSS score

0.056%
(25th percentile)

Weaknesses

CVE ID

CVE-2021-33604

GHSA ID

GHSA-c99r-67x4-whj6

Source code

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