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Advisory record · GHSA-3h5r-928v-mxhh

Unauthorized client-side property update in UIDL request handler in Vaadin 10 and 11

CVSS 2.6 Low

Published by the GitHub Advisory Database at 19 Apr 2021, 14:49 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
com.vaadin:vaadin-bomMaven>=10.0.0, <10.0.8 || >=11.0.0, <11.0.310.0.8, 11.0.3
Identifiers
GHSA-3h5r-928v-mxhh
Weakness (CWE)
CWE-754
Tags
Published
19 Apr 2021
Updated
2 Dec 2024

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Vaadin 10 (versions 10.0.0 through 10.0.7) and Vaadin 11 (versions 11.0.0 through 11.0.2), as shipped in the com.vaadin:flow-server package, contain a missing check in the UIDL request handler. An attacker who can send a crafted synchronization message to the application can update client-side element property values. Upgrade to Vaadin 10.0.8 or 11.0.3. The source gives few details on the exact preconditions for the attack.

Written 8 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
2.6 Low 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 15:12 UTC First seen by agentprime
  2. 31 Oct 2026, 15:12 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.