---
id: CVE-2025-66507
title: '1Panel is an open-source, web-based control panel for Linux server management'
summary: >-
  1Panel is an open-source, web-based control panel for Linux server management.
  Versions 2.0.13 and below allow an unauthenticated attacker to disable CAPTCHA
  verification by abusing a client-controlled parameter. Because the server
  previ…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-290
  - CWE-602
  - CWE-807
vendor: fit2cloud
product: 1panel
affected:
  - 1panel < 2.0.14
patched:
  - 1panel 2.0.14
published: '2025-12-09'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T21:10:00.183'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-66507'
references:
  - url: >-
      https://github.com/1Panel-dev/1Panel/commit/ac43f00273be745f8d04b90b6e2b9c1a40ef7bca
    label: security-advisories@github.com
  - url: 'https://github.com/1Panel-dev/1Panel/releases/tag/v2.0.14'
    label: security-advisories@github.com
  - url: >-
      https://github.com/1Panel-dev/1Panel/security/advisories/GHSA-qmg5-v42x-qqhq
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00467
epssPercentile: 0.38885
ingestedAt: '2026-10-14T21:57:04.741Z'
---

## Overview

1Panel is an open-source, web-based control panel for Linux server management. Versions 2.0.13 and below allow an unauthenticated attacker to disable CAPTCHA verification by abusing a client-controlled parameter. Because the server previously trusted this value without proper validation, CAPTCHA protections can be bypassed, enabling automated login attempts and significantly increasing the risk of account takeover (ATO). This issue is fixed in version 2.0.14.

## Affected

- `1panel < 2.0.14`

## Remediation

Upgrade past the affected range:

- `1panel 2.0.14`