CVE-2021-31406
Medium
Description
Non-constant-time comparison of CSRF tokens in endpoint request handler in com.vaadin:flow-server versions 3.0.0 through 5.0.3 (Vaadin 15.0.0 through 18.0.6), and com.vaadin:fusion-endpoint version 6.0.0 (Vaadin 19.0.0) allows attacker to guess a security token for Fusion endpoints via timing attack.
SeverityMedium
CVSS4.0
Exploit probability11. percentile0.2%
Product
Vaadin Flow
PublishedApr 23, 2021
First seenApr 23, 2021
Weakness typeCWE-208CWE-208
How to fix
Update
- vaadin flow5.0.4 or later
- vaadin vaadin18.0.7 or later
- com.vaadin:flow-server5.0.4, 6.0.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vaadin flow | 3.0.0 ≤ v < 5.0.4, 6.0.0 | 5.0.4 |
| vaadin vaadin | 15.0.0 ≤ v < 18.0.7, 19.0.0 | 18.0.7 |
| com.vaadin:flow-serverMaven | 3.0.0 ≤ v < 5.0.4, 6.0.0 ≤ v < 6.0.1 | 5.0.4, 6.0.1 |
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