High severity · published Apr 23, 2021
CVE-2021-31408
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…
7.1
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FL
Flow · Vaadin
5.0.0 before 6.0.0; 6.0.0 before 6.0.5 · source: NVD
VA
Vaadin · Vaadin
19.0.0 before 19.0.4; 18.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-31408
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-31408
Patch
https://github.com/vaadin/flow/pull/10577
Vendor Advisory
https://vaadin.com/security/cve-2021-31408
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