CVE-2025-66508 Details
Description
1Panel is an open-source, web-based control panel for Linux server management. Versions 2.0.14 and below use Gin's default configuration which trusts all IP addresses as proxies (TrustedProxies = 0.0.0.0/0), allowing any client to spoof the X-Forwarded-For header. Since all IP-based access controls (AllowIPs, API whitelists, localhost-only checks) rely on ClientIP(), attackers can bypass these protections by simply sending X-Forwarded-For: 127.0.0.1 or any whitelisted IP. This renders all IP-based security controls ineffective. This issue is fixed in version 2.0.14.
A vulnerability in 1Panel, a web-based Linux server management control panel, allows remote clients to spoof the X-Forwarded-For header and bypass IP-based access controls. This issue affects all versions of 1Panel through 2.0.14. The vulnerability arises because the server trusts all reverse-proxy headers by default, allowing clients to manipulate their perceived IP address. As a result, protections that rely on IP whitelists or localhost checks are rendered ineffective.
Users can upgrade to 1Panel version 2.0.15 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Dec 9, 2025References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-290 | Authentication Bypass by Spoofing | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| fit2cloud 1panel | < 2.0.14 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Dec 10, 2025 | Initial Analysis | [email protected] |
| Dec 9, 2025 | New CVE Received | [email protected] |