CVE-2021-31408

HIGH
Published Apr 23, 20215y ago · Modified Jun 17, 20262w ago
7.1 CVSS 3.1
High
Find Similar
Published Apr 23, 2021 5y ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
7.1
Exploitability
1.8
Impact
5.2
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity High
Availability None

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-613

Affected Products 4

VendorProductVersionRange
vaadinflow*≥5.0.0  –  <6.0.0
vaadinflow*≥6.0.0  –  <6.0.5
vaadinvaadin*≥19.0.0  –  <19.0.4
vaadinvaadin18.0.0any

References 2

  • github.com https://github.com/vaadin/flow/pull/10577
    PatchThird Party Advisory
  • vaadin.com https://vaadin.com/security/cve-2021-31408
    Vendor Advisory

Remediation

  • github.com https://github.com/vaadin/flow/pull/10577
    PatchThird Party Advisory