Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vaadin | Flow | >= 3.0.0, < 5.0.4 |
| Vaadin | Vaadin | >= 15.0.0, < 18.0.7 |
Related Weaknesses (CWE)
References
- https://github.com/vaadin/flow/pull/10157PatchThird Party Advisory
- https://vaadin.com/security/cve-2021-31406Vendor Advisory
- https://github.com/vaadin/flow/pull/10157PatchThird Party Advisory
- https://vaadin.com/security/cve-2021-31406Vendor Advisory
FAQ
What is CVE-2021-31406?
CVE-2021-31406 is a vulnerability with a CVSS score of 4.0 (MEDIUM). 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....
How severe is CVE-2021-31406?
CVE-2021-31406 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-31406?
Check the references section above for vendor advisories and patch information. Affected products include: Vaadin Flow, Vaadin Vaadin.