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CVE-2025-66507— 1Panel – CAPTCHA Bypass via Client-Controlled Flag

Quick assessment

Affected
1Panel-dev 1Panel
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

1Panel是中国1Panel社区的一个开源的Linux服务器运维管理面板。 1Panel 2.0.13及之前版本存在安全漏洞，该漏洞源于未验证客户端参数，可能导致CAPTCHA绕过和账户接管。

CVSS 7.5 · High EPSS 0.47% · P38
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I. Basic Information for CVE-2025-66507

Vulnerability Information
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Vulnerability Title
1Panel – CAPTCHA Bypass via Client-Controlled Flag
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端安全的客户端实施
Source: CVE Program / CVE List V5
Vulnerability Title
1Panel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
1Panel是中国1Panel社区的一个开源的Linux服务器运维管理面板。 1Panel 2.0.13及之前版本存在安全漏洞，该漏洞源于未验证客户端参数，可能导致CAPTCHA绕过和账户接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
1Panel-dev 1Panel < 2.0.14 -

II. Public POCs for CVE-2025-66507

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7593 chars
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POC zip download
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III. Intelligence Information for CVE-2025-66507

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Patches & Fixes for CVE-2025-66507 (1)

Vendor Advisories for CVE-2025-66507 (1)

Other References for CVE-2025-66507 (1)

IV. Related Vulnerabilities

Same product: 1Panel
Same vendor: 1Panel-dev
Same weakness: CWE-602

V. Comments for CVE-2025-66507

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