CVE-2021-31408— Server session is not invalidated when logout() helper method of Authentication module is used in Vaadin 18-19
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I. Basic Information for CVE-2021-31408
Vulnerability Information
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Vulnerability Title
Server session is not invalidated when logout() helper method of Authentication module is used in Vaadin 18-19
Source: NVD (National Vulnerability Database)
Vulnerability Description
Authentication.logout() helper in com.vaadin:flow-client versions 5.0.0 prior to 6.0.0 (Vaadin 18), and 6.0.0 through 6.0.4 (Vaadin 19.0.0 through 19.0.3) uses incorrect HTTP method, which, in combination with Spring Security CSRF protection, allows local attackers to access Fusion endpoints after the user attempted to log out.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
不充分的会话过期机制
Source: NVD (National Vulnerability Database)
Vulnerability Title
Vaadin flow 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vaadin flow是一个应用软件。Vaadin平台的Java框架，用于构建外观美观，性能良好并让您和您的用户感到满意的现代网站。 vaadin:flow-client 存在代码问题漏洞，该漏洞允许本地攻击者在用户尝试注销后访问Fusion端点。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Vaadin | Vaadin | 18.0.0 ~ * | - | |
| Vaadin | flow-client | 5.0.0 ~ * | - |
II. Public POCs for CVE-2021-31408
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://vaadin.com/security/cve-2021-31408x_refsource_MISC
- https://github.com/vaadin/flow/pull/10577x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-31408
Same Patch Batch · Vaadin · 2021-04-23 · 13 CVEs total
| CVE-2021-31407 | 8.6 HIGH | Server classes and resources exposure in OSGi applications using Vaadin 12-14 and 19 |
| CVE-2021-31410 | 8.6 HIGH | Project sources exposure in Vaadin Designer |
| CVE-2020-36320 | 7.5 HIGH | Regular expression Denial of Service (ReDoS) in EmailValidator class in Vaadin 7 |
| CVE-2021-31405 | 7.5 HIGH | Regular expression denial of service (ReDoS) in EmailField component in Vaadin 14 and 15-1 |
| CVE-2019-25027 | 6.1 MEDIUM | Reflected cross-site scripting in default RouteNotFoundError view in Vaadin 10 and 11-13 |
| CVE-2020-36321 | 5.9 MEDIUM | Directory traversal in development mode handler in Vaadin 14 and 15-17 |
| CVE-2019-25028 | 5.4 MEDIUM | Stored cross-site scripting in Grid component in Vaadin 7 and 8 |
| CVE-2021-31403 | 4.0 MEDIUM | Timing side channel vulnerability in UIDL request handler in Vaadin 7 and 8 |
| CVE-2021-31404 | 4.0 MEDIUM | Timing side channel vulnerability in UIDL request handler in Vaadin 10, 11-14, and 15-18 |
| CVE-2021-31406 | 4.0 MEDIUM | Timing side channel vulnerability in endpoint request handler in Vaadin 15-19 |
| CVE-2020-36319 | 3.1 LOW | Potential sensitive data exposure in applications using Vaadin 15 |
| CVE-2018-25007 | 2.6 LOW | Unauthorized client-side property update in UIDL request handler in Vaadin 10 and 11 |
IV. Related Vulnerabilities
Same weakness: CWE-613
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jupyter-server authentication cookies remain valid after pas - CVE-2026-42421
OpenClaw < 2026.4.8 - WebSocket Session Persistence via Shar
V. Comments for CVE-2021-31408
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