CVE-2021-31404
Timing side channel vulnerability in UIDL request handler in Vaadin 10, 11-14, and 15-18
4.0
MEDIUM
CVSS 3.1
EPSS 0.04%
Description
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 through 13), 2.0.0 through 2.4.6 (Vaadin 14.0.0 through 14.4.6), 3.0.0 prior to 5.0.0 (Vaadin 15 prior to 18), and 5.0.0 through 5.0.2 (Vaadin 18.0.0 through 18.0.5) allows attacker to guess a security token via timing attack. - https://vaadin.com/security/cve-2021-31404
How to fix CVE-2021-31404
To remediate CVE-2021-31404, upgrade the affected package to a fixed version below.
- —upgrade to 1.0.14 or later
Is CVE-2021-31404 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 1.0.0, < 1.0.14
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.0 | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |