CVE-2021-31403
lowpriority · track · 10EPSS 0.003 · 23 %ileEUUSEPSS · scored 2026-10-27
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
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.9–4
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (8)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-75xc-qvxh-27f8Timing side channel vulnerability in UIDL request handler in Vaadin 7 and 82021-04-19ghsa · osvUS
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 - https://vaadin.com/security/cve-2021-31403
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://github.com/vaadin/framework/pull/12188cnnvd
- https://github.com/vaadin/framework/pull/12190cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-31403cnnvd
- https://vaadin.com/security/cve-2021-31403cnnvd
- https://github.com/vaadin/framework/pull/12188enisa_euvd
- https://github.com/vaadin/framework/pull/12190enisa_euvd
- https://vaadin.com/security/cve-2021-31403enisa_euvd
- https://github.com/vaadin/framework/pull/12188PatchThird Party Advisorynvd
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