CVE-2025-34069CWE-306

GFI Kerio Control GFIAgent Authentication Bypass via Proxy Forwarding

Critical · published July 2, 2025

CVSS v4.0
9.5
EPSS
1%
Percentile
52.5
In the wild
Unconfirmed
What it is

🚨 An insecure default proxy might just be the uninvited guest at your security party! 🎉 Think of it like a restaurant with a side door that everyone forgot to lock. A crafty diner could slip in through that door, bypassing all the checks at the main entrance, and access the kitchen where all the secret recipes are stored! This authentication bypass vulnerability allows unauthenticated attackers to stroll right into your GFI Kerio Control system and take full control like they own the place! They could retrieve sensitive information, such as the appliance UUID, and issue administrative commands, leaving your entire network vulnerable to a catastrophic breach. It's a recipe for disaster, and you definitely don’t want to be the chef that forgot to lock the kitchen! 🔥

Put simply

Think of it like a restaurant with a side door that everyone forgot to lock. A crafty diner could slip in through that door, bypassing all the checks at the main entrance, and access the kitchen where all the secret recipes are stored! Due to insecure default proxy settings and weak access control in the GFIAgent service on GFI Kerio Control 9.4.5, attackers can leverage the non-transparent proxy on TCP port 3128 to forward requests to internal services without authentication, gaining access to admin endpoints.

What to do

This authentication bypass vulnerability allows unauthenticated attackers to stroll right into your GFI Kerio Control system and take full control like they own the place! They could retrieve sensitive information, such as the appliance UUID, and issue administrative commands, leaving your entire network vulnerable to a catastrophic breach. It's a recipe for disaster, and you definitely don’t want to be the chef that forgot to lock the kitchen! 🔥 Act fast: update GFI Kerio Control to version 9.4.6 or later to patch this critical vulnerability. Additionally, review your proxy configurations and tighten access controls to prevent unauthorized requests from slipping through. Don't let that side door stay open! 🔒 You've got this! Follow these steps and secure your network like the hero you are! 🦸‍♂️

The record
Technical detail
CVSS v4.0
9.5 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS
0.00696 · 52.5th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2025-07-02T13:44Z
EPSS history
Timeline
  • 02 JUL 13:44Z
    GFI Kerio Control GFIAgent Authentication Bypass via Proxy Forwarding
    cvelistv5