What is CVE-2025-66507?

CVE-2025-66507 is a high-severity vulnerability in 1panel-Dev 1panel, classified under Authentication Bypass by Spoofing. CVSS score: 7.5/10. Published 2025-12-09.

How severe is CVE-2025-66507?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in 1panel-Dev 1panel

CVE-2025-66507

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.

EPSS: 0.005 (38.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

1panel-dev 1panel — versions < 2.0.14
Fit2cloud 1panel

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2025-66507?: CVE-2025-66507 is a high-severity vulnerability in 1panel-Dev 1panel, classified under Authentication Bypass by Spoofing. CVSS score: 7.5/10. Published 2025-12-09.
How severe is CVE-2025-66507?: High severity. CVSS v3 base score is 7.5 out of 10.