Vulnerability CVE-2021-31403
Published: 2021-04-23

Description:
Non-constant-time comparison of CSRF tokens in UIDL request handler in com.vaadin:vaadin-server versions 7.0.0 through 7.7.23 (Vaadin 7.0.0 through 7.7.23), and 8.0.0 through 8.12.2 (Vaadin 8.0.0 through 8.12.2) allows attacker to guess a security token via timing attack

Type:

CWE-203

 (Information Exposure Through Discrepancy)

CVSS2 => (AV:L/AC:M/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
1.9/10
2.9/10
3.4/10
Exploit range
Attack complexity
Authentication
Local
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Vaadin -> Vaadin 

 References:
https://vaadin.com/security/cve-2021-31403
https://github.com/vaadin/framework/pull/12188
https://github.com/vaadin/framework/pull/12190
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