Mega-Fence (webgate-lib.*) 25.1.914 and prior trusts the first value of the…
Priority LOW 34CWE-807Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00269 19th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mega-fence_project:mega-fence:*:*:*:*:*:*:*:* | up to 25.1.914 | Vulnerable | Mega-fence Project |
- cpe:2.3:a:mega-fence_project:mega-fence:*:*:*:*:*:*:*:* Versions up to 25.1.914 Vulnerable ·Mega-fence Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-65328
- 2026-10-03 Alias added: GHSA-6gh2-xjvw-7rh4
References
Sources
- CVE-2025-65328 · CVE Program
- CVE-2025-65328 · NVD
- FIRST EPSS
- GHSA-6gh2-xjvw-7rh4 · GitHub Advisory Database · CC BY 4.0
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