CVE-2025-65328
Medium
Description
Mega-Fence (webgate-lib.*) 25.1.914 and prior trusts the first value of the X-Forwarded-For (XFF) header as the client IP without validating a trusted proxy chain. An attacker can supply an arbitrary XFF value in a remote request to spoof the client IP, which is then propagated to security-relevant state (e.g., WG_CLIENT_IP cookie). Deployments that rely on this value for IP allowlists may be bypassed.
SeverityMedium
CVSS6.5
Exploit probability—
ProductMega-fence
PublishedJan 5, 2026
First seenJan 5, 2026
Weakness typeCWE-807CWE-807
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mega-fence_project mega-fence | v ≤ 25.1.914 | — |
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