CVE-2025-66507Network attack vector

CAPTCHA bypass via client-controlled login flag

Published Dec 9, 2025 · Updated Dec 9, 2025

CAPTCHA bypass in 1Panel before 2.0.14 allows remote attackers to skip login CAPTCHA checks via a client-controlled request flag. The /api/login handler trusted the request body's ignoreCaptcha boolean and skipped captcha.VerifyCode when the flag was true. No prior session or privilege is required; the bypass removes an anti-automation control and enables repeated password-guessing attempts.

CVSS severity7.5
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CAPTCHA bypass in 1Panel before 2.0.14 allows remote attackers to skip login CAPTCHA checks via a client-controlled request flag. The /api/login handler trusted the request body's ignoreCaptcha boolean and skipped captcha.VerifyCode when the flag was true. No prior session or privilege is required; the bypass removes an anti-automation control and enables repeated password-guessing attempts.

The record

CVE
CVE-2025-66507
Published
Dec 9, 2025
Updated
Dec 9, 2025
Vendor
KubeOperator
Product
1Panel
Classifications
CWE-290, CWE-602, CWE-807, T1110.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.0.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

KubeOperator · 1Panelversion=< 2.0.14

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
CWE-602Client-Side Enforcement of Server-Side Security
CWE-807Reliance on Untrusted Inputs in a Security Decision
T1110.001Password Guessing

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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