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Vulnerability details: VCID-yu3h-ecpv-qyhu
Vulnerability ID VCID-yu3h-ecpv-qyhu
Aliases CVE-2021-31407
GHSA-25xc-jwfq-39jw
Summary Exposure of Resource to Wrong Sphere A vulnerability in the OSGi integration in `com.vaadin:flow-server` allows attackers to access application classes and resources on the server via crafted HTTP request.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-668 Exposure of Resource to Wrong Sphere
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-402 Transmission of Private Resources into a New Sphere ('Resource Leak')
System Score Found at
epss 0.01802 https://api.first.org/data/v1/epss?cve=CVE-2021-31407
cvssv3.1 8.6 https://github.com/vaadin/flow
generic_textual HIGH https://github.com/vaadin/flow
cvssv3.1 8.6 https://github.com/vaadin/flow/pull/10229
generic_textual HIGH https://github.com/vaadin/flow/pull/10229
cvssv3.1 8.6 https://github.com/vaadin/flow/pull/10269
generic_textual HIGH https://github.com/vaadin/flow/pull/10269
cvssv3.1 8.6 https://github.com/vaadin/flow/security/advisories/GHSA-25xc-jwfq-39jw
generic_textual HIGH https://github.com/vaadin/flow/security/advisories/GHSA-25xc-jwfq-39jw
cvssv3.1 8.6 https://github.com/vaadin/osgi/issues/50
generic_textual HIGH https://github.com/vaadin/osgi/issues/50
cvssv3.1 8.6 https://nvd.nist.gov/vuln/detail/CVE-2021-31407
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2021-31407
cvssv3.1 8.6 https://vaadin.com/security/cve-2021-31407
generic_textual HIGH https://vaadin.com/security/cve-2021-31407
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-31407
https://github.com/vaadin/flow
https://github.com/vaadin/flow/pull/10229
https://github.com/vaadin/flow/pull/10269
https://github.com/vaadin/flow/security/advisories/GHSA-25xc-jwfq-39jw
https://github.com/vaadin/osgi/issues/50
CVE-2021-31407 https://nvd.nist.gov/vuln/detail/CVE-2021-31407
CVE-2021-31407 https://vaadin.com/security/cve-2021-31407
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N Found at https://github.com/vaadin/flow
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N Found at https://github.com/vaadin/flow/pull/10229
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N Found at https://github.com/vaadin/flow/pull/10269
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N Found at https://github.com/vaadin/flow/security/advisories/GHSA-25xc-jwfq-39jw
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N Found at https://github.com/vaadin/osgi/issues/50
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-31407
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N Found at https://vaadin.com/security/cve-2021-31407
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.83139
EPSS Score 0.01802
Published At June 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:21:05.349746+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/com.vaadin/vaadin-server/CVE-2021-31407.yml 38.6.0