CVE-2021-31411

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

Description

Insecure temporary directory usage in frontend build functionality of com.vaadin:flow-server versions 2.0.9 through 2.5.2 (Vaadin 14.0.3 through Vaadin 14.5.2), 3.0 prior to 6.0 (Vaadin 15 prior to 19), and 6.0.0 through 6.0.5 (Vaadin 19.0.0 through 19.0.4) allows local users to inject malicious code into frontend resources during application rebuilds.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

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-379

Affected Products 5

VendorProductVersionRange
vaadinflow*≥2.0.9  –  <2.5.3
vaadinflow*≥3.0.0  –  ≤5.0.0
vaadinflow*≥6.0.0  –  ≤6.0.6
vaadinvaadin*≥14.0.3  –  <14.5.3
vaadinvaadin*≥15.0.0  –  <19.0.5

References 2

  • github.com https://github.com/vaadin/flow/pull/10640
    PatchThird Party Advisory
  • vaadin.com https://vaadin.com/security/cve-2021-31411
    Vendor Advisory

Remediation

  • github.com https://github.com/vaadin/flow/pull/10640
    PatchThird Party Advisory