Vulnerability in Vaadin Flow
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 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.
EPSS: 0.002 (11.2th 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
- Vaadin Flow-server — versions 1.0.0
- Vaadin — versions 10.0.0
Weakness classification (CWE)
References
- security@vaadin.com (x_refsource_MISC, Vendor Advisory)
- security@vaadin.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-31404?
- CVE-2021-31404 is a medium-severity vulnerability in Vaadin Flow, 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.