CVE-2023-25500 is a low-severity (CVSS 3.5) Information Exposure vulnerability in com.vaadin:flow-server. A fix is available for com.vaadin:flow-server — see the affected versions and patch details below.
Vaadin vulnerable to possible information disclosure of class and method names in RPC response
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2023-25500.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
com.vaadin:flow-server☕com.vaadin:flow-server☕com.vaadin:flow-server☕com.vaadin:flow-server☕com.vaadin:flow-server☕com.vaadin:flow-server☕com.vaadin:vaadin☕com.vaadin:vaadin+4 moreReal-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
Description
Possible information disclosure in Vaadin 10.0.0 to 10.0.23, 11.0.0 to 14.10.1, 15.0.0 to 22.0.28, 23.0.0 to 23.3.13, 24.0.0 to 24.0.6, 24.1.0.alpha1 to 24.1.0.rc2, resulting in potential information disclosure of class and method names in RPC responses by sending modified requests.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | com.vaadin:flow-server | ≥ 1.0.0&&< 1.0.21 | 1.0.21com.vaadin:flow-server:1.0.21 |
| ☕Maven | com.vaadin:flow-server | ≥ 1.1.0&&< 2.9.3 | 2.9.3com.vaadin:flow-server:2.9.3 |
| ☕Maven | com.vaadin:flow-server | ≥ 3.0.0&&< 9.1.2 | 9.1.2com.vaadin:flow-server:9.1.2 |
| ☕Maven | com.vaadin:flow-server | ≥ 23.0.0&&< 23.3.13 | 23.3.13com.vaadin:flow-server:23.3.13 |
| ☕Maven | com.vaadin:flow-server | ≥ 24.0.0&&< 24.0.9 | 24.0.9com.vaadin:flow-server:24.0.9 |
| ☕Maven | com.vaadin:flow-server | ≥ 24.1.alpha1&&< 24.1.0 | 24.1.0com.vaadin:flow-server:24.1.0 |
Affected Products
vaadinvaadinDetection & mitigation playbook
Open-source dependencyDetect
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.
Fix
Update com.vaadin:flow-server to 1.0.21 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-25500 is resolved across your whole dependency graph.
Workarounds
Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them.
Frequently Asked Questions
Is CVE-2023-25500 in your dependencies?
Find it across Maven, including transitive dependencies.