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CVE-2025-66507

1Panel – CAPTCHA Bypass via Client-Controlled Flag

Published: Dec 9, 2025Updated: Dec 10, 2025 Sources: CVE List NVD GHSACWE-290
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.4%
Top 69.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-290CWE-602CWE-807

Affected Products

1Panel1Panel-dev
On-prem
Cloud & SaaS / cloud-platform
1panelfit2cloud
SaaSSaaS Service
Cloud & SaaS / saas-application
github.com/1Panel-dev/1PanelGoOSS Libraries
github.com/1Panel-dev/1Panel/coreGoOSS Libraries
1panel-devoss-projectCNCloud & SaaSaka 1panel
fit2cloudcommercialCloud & SaaSaka jumpserver, 1panel, cloudexplorer lite
gopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://github.com/1Panel-dev/1Panel/security/advisories/GHSA-qmg5-v42x-qqhq
github.com
https://github.com/1Panel-dev/1Panel/commit/ac43f00273be745f8d04b90b6e2b9c1a40ef7bca
github.com
https://github.com/1Panel-dev/1Panel/releases/tag/v2.0.14
github.com
and 2 more references View all →

Timeline

Published
Dec 9, 2025
Last Updated
Dec 10, 2025

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