CVE-2021-31406CWE-208

Timing side channel vulnerability in endpoint request handler in Vaadin 15-19

Medium · published April 23, 2021

CVSS v3.1
4.0
EPSS
0%
Percentile
10.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.0 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00211 · 10.8th percentile
Weakness
CWE-208 · Observable Timing Discrepancy
Published
2021-04-23T16:05Z
EPSS history
Timeline
  • 23 APR 16:05Z
    Timing side channel vulnerability in endpoint request handler in Vaadin 15-19
    cvelistv5