Timing side channel vulnerability in UIDL request handler in Vaadin 10, 11-14, and 15-18
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | com.vaadin:vaadin-bom | >= 10.0.0, < 10.0.17, >= 11.0.0, < 14.4.7, >= 15.0.0, < 18.0.6 | 10.0.17, 14.4.7, 18.0.6 |
References
- CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N- Weakness (CWE)
CWE-208- Platform
- Java / Kotlin (Maven)
- Package
com.vaadin:vaadin-bom- Disclosed
- 19.04.2021
- Updated
- 11.10.2026 12:21
Sources and licenses
OSV / GitHub Advisory Database - GHSA-c6c4-7x48-4cqp - CC BY 4.0
Vulnerability history: com.vaadin:vaadin-bom
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 18
- First → latest
- 04.2021 11.2021
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 5
- Medium 10
- Low 3
Disclosures per year
- 2021: 18
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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Timing side channel vulnerability in UIDL request handler in Vaadin 10, 11-14, and 15-18 this entry
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