What is CVE-2021-31406?

CVE-2021-31406 is a medium-severity vulnerability in Vaadin Flow-server, classified under CWE-208. CVSS score: 4.0/10. Published 2021-04-23.

How severe is CVE-2021-31406?

Medium severity. CVSS v3 base score is 4.0 out of 10.

Vulnerability in Vaadin Flow-server

CVE-2021-31406

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…

EPSS: 0.001 (17.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Vaadin Flow-server — versions 6.0.0, 3.0.0
Vaadin — versions 19.0.0, 15.0.0

Weakness classification (CWE)

CWE-208

References

vaadin.com/security/cve-2021-31406 (x_refsource_MISC)
github.com/vaadin/flow/pull/10157 (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-31406?: CVE-2021-31406 is a medium-severity vulnerability in Vaadin Flow-server, classified under CWE-208. CVSS score: 4.0/10. Published 2021-04-23.
How severe is CVE-2021-31406?: Medium severity. CVSS v3 base score is 4.0 out of 10.