CVE-2025-66507 — 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 abu…
Published: 2025-12-09 · CVSS: 7.5 · CVSS 3.1
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 · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7