# CVE-2025-66508: 1Panel IP Access Control Bypass via Untrusted X-Forwarded-For Headers > Attackers can bypass IP-based access controls in 1Panel by spoofing the X-Forwarded-For header due to insecure proxy trust settings. - **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 9 Dec 2025 - **Updated:** 9 Dec 2025 - **Also known as:** GHSA-7cqv-qcq2-r765, GO-2025-4207 ## What is CVE-2025-66508? CVE-2025-66508 is a medium-severity authentication bypass vulnerability in 1Panel-dev 1Panel, published on 9 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official 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. Weakness: CWE-290 (Authentication Bypass by Spoofing) ## Which versions are affected by CVE-2025-66508? 6 open source packages ship an affected version, including github.com/1Panel-dev/1Panel and github.com/1Panel-dev/1Panel/agent. It affects 1 product. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `github.com/1Panel-dev/1Panel` | Go | All versions | 2.0.14 | | `github.com/1Panel-dev/1Panel` | Go | All versions | 2.0.14 | | `github.com/1Panel-dev/1Panel` | Go | All versions | 2.0.14+incompatible | | `github.com/1Panel-dev/1Panel/agent` | Go | All versions | 0.0.0-20251201063338-94f7d78cc976 | | `github.com/1Panel-dev/1Panel/agent` | Go | All versions | 0.0.0-20251201063338-94f7d78cc976 | | `github.com/1Panel-dev/1Panel/agent` | Go | All versions | 0.0.0-20251201063338-94f7d78cc976 | Products: Fit2cloud 1panel. ## How do I fix CVE-2025-66508? Upgrade github.com/1Panel-dev/1Panel to a fixed version for your release line: 2.0.14 or 2.0.14+incompatible. ## Is CVE-2025-66508 being exploited? There is no known exploitation of CVE-2025-66508 in the wild and no public exploit code. ## Other vulnerabilities in 1Panel-dev 1Panel - [CVE-2024-39911](https://insights.sbomify.com/CVE-2024-39911/): 1Panel SQL injection (critical 10.0) - [CVE-2024-39907](https://insights.sbomify.com/CVE-2024-39907/): a sqlinjection in 1Panel (critical 9.8) - [CVE-2025-56413](https://insights.sbomify.com/CVE-2025-56413/): Command injection in n/a (high 8.8) - [CVE-2025-54424](https://insights.sbomify.com/CVE-2025-54424/): 1Panel Agent Bypasses Certificate Verification Leading to Arbitrary Command Execution (high 8.1) - [CVE-2025-66507](https://insights.sbomify.com/CVE-2025-66507/): 1Panel – CAPTCHA Bypass via Client-Controlled Flag (high 7.5) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2025-66508 and fix it if it is affected. What it is: CVE-2025-66508 is a medium-severity authentication bypass vulnerability in 1Panel-dev 1Panel, published on 9 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2025-66508 in the wild and no public exploit code. Affected packages and fixed versions: - github.com/1Panel-dev/1Panel (Go): affected all versions; fixed in 2.0.14 - github.com/1Panel-dev/1Panel (Go): affected all versions; fixed in 2.0.14 - github.com/1Panel-dev/1Panel (Go): affected all versions; fixed in 2.0.14+incompatible - github.com/1Panel-dev/1Panel/agent (Go): affected all versions; fixed in 0.0.0-20251201063338-94f7d78cc976 - github.com/1Panel-dev/1Panel/agent (Go): affected all versions; fixed in 0.0.0-20251201063338-94f7d78cc976 - github.com/1Panel-dev/1Panel/agent (Go): affected all versions; fixed in 0.0.0-20251201063338-94f7d78cc976 Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2025-66508/ (Markdown: https://insights.sbomify.com/CVE-2025-66508/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2025-66508 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-66508 - OSV: https://osv.dev/vulnerability/CVE-2025-66508 --- From sbomify Insights: https://insights.sbomify.com/CVE-2025-66508/ Summaries are generated and may contain mistakes; the official description above is the record.