CVE-2023-25500Network attack vector

Information disclosure via detailed RPC exceptions

Published Jun 22, 2023 · Updated Dec 5, 2024

Information disclosure in affected Vaadin releases allows remote authenticated users to obtain class and method names through crafted RPC requests. PublishedServerEventHandlerRpcHandler embeds the component class and requested handler method in exceptions returned to the RPC client instead of logging those details and returning a generic error. Exploitation requires authenticated access and user interaction; the disclosed information is limited to server-side class and method names.

CVSS severity3.5
Low
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in affected Vaadin releases allows remote authenticated users to obtain class and method names through crafted RPC requests. PublishedServerEventHandlerRpcHandler embeds the component class and requested handler method in exceptions returned to the RPC client instead of logging those details and returning a generic error. Exploitation requires authenticated access and user interaction; the disclosed information is limited to server-side class and method names.

The record

CVE
CVE-2023-25500
Published
Jun 22, 2023
Updated
Dec 5, 2024
Vendor
Flow
Product
Flow Server
Classifications
CWE-200, CWE-1295, T1595.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <=1.0.20
  2. Affected versionversion=1.1.0 <=2.9.2
  3. Affected versionversion=23.0.0 <=23.3.12
  4. Affected versionversion=24.0.0 <=24.0.8
  5. Affected versionversion=24.1.0.alpha1 <=24.1.0.rc3
  6. Affected versionversion=3.0.0 <=9.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Flow · Flow Serverversion=1.0.0 <=1.0.20; version=1.1.0 <=2.9.2; version=23.0.0 <=23.3.12; version=24.0.0 <=24.0.8; version=24.1.0.alpha1 <=24.1.0.rc3; version=3.0.0 <=9.1.1
Vaadin · Vaadin Frameworkversion=10.0.0 <=10.0.23; version=11.0.0 <=14.10.1; version=15.0.0 <=22.0.8; version=23.0.0 <=23.3.13; version=24.0.0 <=24.0.6; version=24.1.0.alpha1 <=24.1.0.rc2

Published CVSS scores

3.5Vaadin Ltd.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-1295Debug Messages Revealing Unnecessary Information
T1595.002Vulnerability Scanning

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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