Vulnerability · Published Jul 2, 2025 · Assigned by VulnCheck
CVE-2025-34069GFI Kerio Control GFIAgent Authentication Bypass via Proxy Forwarding
Critical 9.5
In plain English
A critical-severity missing authentication in Kerio Control from GFI Software. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
An authentication bypass vulnerability exists in GFI Kerio Control 9.4.5 due to insecure default proxy configuration and weak access control in the GFIAgent service. The non-transparent proxy on TCP port 3128 can be used to forward unauthenticated requests to internal services such as GFIAgent, bypassing firewall restrictions and exposing internal management endpoints. This enables unauthenticated attackers to access the GFIAgent service on ports 7995 and 7996, retrieve the appliance UUID, and issue administrative requests via the proxy. Exploitation results in full administrative access to the Kerio Control appliance.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GFI Software | Kerio Control | 9.4.5 |
Weakness: CWE-306 · 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
References
- https://ssd-disclosure.com/ssd-advisory-kerio-control-authentication-bypass-and-rce/ third-party-advisory, technical-description, exploit
- https://vulncheck.com/advisories/gfi-kerio-control-auth-bypass-rce third-party-advisory