CVE-2025-13427

Authentication Bypass in Dialogflow CX Messenger

Published Dec 18, 2025 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Google
Google cloud Dialogflow Cx
Vendors & Products Google
Google cloud Dialogflow Cx
Type Values Removed Values Added
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.
Title Authentication Bypass in Dialogflow CX Messenger
Weaknesses CWE-287
References
Metrics cvssV4_0

{'score': 6.9, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GoogleCloud
Published
Updated
Dec 19, 2025, 3:13 PM
Reserved
Nov 19, 2025, 4:10 PM
Status
Deferred
Published
Dec 18, 2025, 10:15 PM
Modified
Sep 30, 2026, 4:10 PM