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MEDIUM severity

Insecure temporary directory usage in frontend build functionality of Vaadin 14 and 15-19GHSA-c57f-4vp2-jqhm

MEDIUM

GHSA-c57f-4vp2-jqhm is a medium-severity (CVSS 6.3) vulnerability in com.vaadin:flow-server. A fix is available for com.vaadin:flow-server — see the affected versions and patch details below.

Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Dec 2, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

2 pkgs affected
☕com.vaadin:flow-server☕com.vaadin:flow-server

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

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.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
☕Mavencom.vaadin:flow-server≥ 2.0.9&&< 2.5.32.5.3com.vaadin:flow-server:2.5.3
☕Mavencom.vaadin:flow-server≥ 3.0.0&&< 6.0.66.0.6com.vaadin:flow-server:6.0.6

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.vaadin:flow-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update com.vaadin:flow-server to 2.5.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-c57f-4vp2-jqhm is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

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. - https://vaadin.com/security/cve-2021-31411
O3 Security · Impact-Aware SCA

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Insecure temporary directory usage in frontend build…