GHSA-6hgr-2g6q-3rmc
Server session is not invalidated when logout() helper method of Authentication module is used in Vaadin 18-19
GHSA-6hgr-2g6q-3rmc is a medium vulnerability (CVSS 6.3) in com.vaadin:flow-client, published April 22, 2021. No source lists public exploit code. Fixed in com.vaadin:flow-client 6.0.5.
- Severity
- 6.3 MediumCVSS 3.1, GitHub Advisories
- Exploit chance
- UnscoredNo EPSS score yet
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
6.0.5com.vaadin:flow-client +1 more
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Affected packages
| Package | Affected | Fixed |
|---|---|---|
com.vaadin:flow-clientMaven | 5.0.0 up to 6.0.5 | 6.0.5 |
com.vaadin:flow-clientMaven | 5.0.0 up to 6.0.5, plus listed versions 5.0.15.0.25.0.35.0.46.0.0 Show 4 moreShow less6.0.16.0.26.0.36.0.4 | 6.0.5 |
What each source reports
GitHub Advisories Score used
Server session is not invalidated when logout() helper method of Authentication module is used in Vaadin 18-19
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.
- Record
GHSA-6hgr-2g6q-3rmc- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
OSV
Server session is not invalidated when logout() helper method of Authentication module is used in Vaadin 18-19
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.
- Record
GHSA-6hgr-2g6q-3rmc- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.