CVE-2025-13427 MEDIUM

CVE-2025-13427: Authentication Bypass in Dialogflow CX Messenger

Vendor Google Cloud
Product Dialogflow CX Messenger
Weakness CWE-287 · Improper authentication
Published December 18, 2025
Last update December 19, 2025
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 18, 2025 CVE published
December 19, 2025 Record updated