CVE-2025-12245Network attack vector

Conversation-token theft via unvalidated widget messages

Published Oct 27, 2025 · Updated Oct 27, 2025

Origin validation error in the Chatwoot Widget 4.0 through 4.7.0 allows remote attackers to steal conversation tokens via forged messages. The initPostMessageCommunication handler accepts popoutChatWindow messages from any origin and passes their baseUrl into a popup URL containing the cw_conversation cookie. An attacker must induce a widget user to click once; interception of that popup exposes the persistent token and permits access to the victim's conversation history.

CVSS severity5.3
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation error in the Chatwoot Widget 4.0 through 4.7.0 allows remote attackers to steal conversation tokens via forged messages. The initPostMessageCommunication handler accepts popoutChatWindow messages from any origin and passes their baseUrl into a popup URL containing the cw_conversation cookie. An attacker must induce a widget user to click once; interception of that popup exposes the persistent token and permits access to the victim's conversation history.

The record

CVE
CVE-2025-12245
Published
Oct 27, 2025
Updated
Oct 27, 2025
Vendor
Chatwoot
Product
Chatwoot
Classifications
CWE-346, CWE-345, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=4.0
  2. Affected versionversion=4.1
  3. Affected versionversion=4.2
  4. Affected versionversion=4.3
  5. Affected versionversion=4.4
  6. Affected versionversion=4.5
  7. Affected versionversion=4.6
  8. Affected versionversion=4.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Chatwoot · Chatwootversion=4.0; version=4.1; version=4.2; version=4.3; version=4.4; version=4.5; version=4.6; version=4.7.0

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0VulDBAV:N/AC:L/Au:N/C:P/I:N/A:N
5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-346Origin Validation Error
CWE-345Insufficient Verification of Data Authenticity
T1539Steal Web Session Cookie

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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