CVE-2025-66508: 1Panel · Authentication Bypass by Spoofing
Affects 1PanelSource CVE Database V5
Not known to be exploited · CVSS 6.5 Medium : upgrade to 2.0.14 when convenient.
Data as of 26 Oct 2026, 07:57 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2.0.14
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 9 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.
What to do
Upgrade 1panel-dev/1Panel to 2.0.14.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
GitHub1panel-dev/1Panelpkg:github/1panel-dev/1PanelOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
European organizations should immediately upgrade all instances of 1Panel to version 2.0.14 or later, where the TrustedProxies configuration is properly restricted. Until upgrades can be completed, administrators should implement network-level controls to restrict access to the 1Panel interface only to trusted IP addresses via firewalls or VPNs, reducing exposure to external attackers. Additionally, review and harden any IP-based access control lists to ensure they do not rely solely on client IP headers. Employ web application firewalls (WAFs) capable of detecting and blocking suspicious X-Forwarded-For header manipulations. Monitor access logs for anomalous IP addresses or repeated attempts to spoof headers. Consider disabling or limiting the use of proxy headers if not required in the deployment environment. Finally, conduct security awareness training for administrators to recognize and respond to potential unauthorized access attempts.
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.