What is CVE-2021-31404?

CVE-2021-31404 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-2021-31404?

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

Vulnerability in Vaadin Flow-server

CVE-2021-31404

Non-constant-time comparison of CSRF tokens in UIDL request handler in com.vaadin:flow-server versions 1.0.0 through 1.0.13 (Vaadin 10.0.0 through 10.0.16), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.4.6 (Vaadin 14.0.0 t…

EPSS: 0.000 (14.5th 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 1.0.0
Vaadin — versions 10.0.0

Weakness classification (CWE)

CWE-208

References

vaadin.com/security/cve-2021-31404 (x_refsource_MISC)
github.com/vaadin/flow/pull/9875 (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-31404?: CVE-2021-31404 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-2021-31404?: Medium severity. CVSS v3 base score is 4.0 out of 10.