CVE-2025-13427
Authentication Bypass in Dialogflow CX Messenger
- State
- Published
- Severity
- 6.9 Medium
- Published
- Dec 18, 2025
- Updated
- Dec 19, 2025
- Reserved
- Nov 19, 2025
Description
An authentication bypass vulnerability in Google Cloud Dialogflow CX Messenger allowed unauthenticated users to interact with restricted chat agents, gaining access to the agents' knowledge and the ability to trigger their intents, by manipulating initialization parameters or crafting specific API requests.
All versions after August 20th, 2025 have been updated to protect from this vulnerability. No user action is required for this.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N | GoogleCloud |
Weaknesses
- CWE-287 Improper Authentication
Affected Products
| Product | Versions |
|---|---|
Dialogflow CX MessengerGoogle Cloud |
|
References
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