CVE-2021-31403: Observable Discrepancy

April 19, 2021 (updated May 3, 2021)

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

References

github.com/advisories/GHSA-75xc-qvxh-27f8
github.com/vaadin/framework/pull/12188
github.com/vaadin/framework/pull/12190
github.com/vaadin/framework/security/advisories/GHSA-75xc-qvxh-27f8
nvd.nist.gov/vuln/detail/CVE-2021-31403
vaadin.com/security/cve-2021-31403

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