CVE-2025-13427 Authentication Bypass in Dialogflow CX Messenger
Unauthenticated attackers can bypass authentication to access restricted chat agent knowledge and trigger intents in Google Cloud Dialogflow CX Messenger.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-13427?
CVE-2025-13427 is a medium-severity authentication bypass vulnerability in Google Cloud Dialogflow CX Messenger, published on 18 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2025-13427?
How do I fix CVE-2025-13427?
No fix has been published for CVE-2025-13427 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-13427 being exploited?
There is no known exploitation of CVE-2025-13427 in the wild and no public exploit code.
Sources
Also known as GHSA-p5gx-f9rx-95rw.