CVE-2021-31408

high

Description

Authentication.logout() helper in com.vaadin:flow-client versions 5.0.0 prior to 6.0.0 (Vaadin 18), and 6.0.0 through 6.0.4 (Vaadin 19.0.0 through 19.0.3) uses incorrect HTTP method, which, in combination with Spring Security CSRF protection, allows local attackers to access Fusion endpoints after the user attempted to log out.

References

https://vaadin.com/security/cve-2021-31408

https://github.com/vaadin/flow/pull/10577

Details

Source: Mitre, NVD

Published: 2021-04-23

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 3.3

Vector: CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:N

Severity: Low

CVSS v3

Base Score: 7.1

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Severity: High

EPSS

EPSS: 0.00112