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.
Affected products
mega-fence_project: mega-fence
References2
- raw.githubusercontent.com/p1aintext/CVE/main/CVE-2025-65328.md ExploitThird Party Advisory
- drive.proton.me/urls/MY05PVBFXG#xDd2Xqy98WM9 Broken Link
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 19 · as of 11 November 2026
- CWE
- CWE-807
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