GHSA-qmg5-v42x-qqhq · Severity: high · Ecosystem: go — 1Panel – CAPTCHA Bypass via Client-Controlled Flag
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.
Conclusion & alert: CVE-2025-66507 is rated Moderate Risk (41.8/100): CVSS High severity, with low exploitation likelihood (EPSS 0.14%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-19 | 0.16% | 0.14% | -0.02% |
| 2 | 2026-05-08 | 0.12% | 0.16% | +0.04% |
| 3 | 2026-05-06 | — | 0.12% | — |
Full EPSS history (5 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-qmg5-v42x-qqhq · Severity: high · Ecosystem: go — 1Panel – CAPTCHA Bypass via Client-Controlled Flag