Cal.com < 5.9.8 - Authentication Bypass via TOTP Code
Title source: llmExploitation Summary
EIP tracks 1 public exploit for CVE-2025-66489. PoCs published by exploitintel.
AI-analyzed exploit summary The repository contains functional Python PoC scripts demonstrating an authentication bypass vulnerability in Cal.com via TOTP code injection. The exploit leverages a logic flaw in the NextAuth credentials provider to skip password verification entirely.
Description
Cal.com is open-source scheduling software. Prior to 5.9.8, A flaw in the login credentials provider allows an attacker to bypass password verification when a TOTP code is provided, potentially gaining unauthorized access to user accounts. This issue exists due to problematic conditional logic in the authentication flow. This vulnerability is fixed in 5.9.8.
Exploits (1)
The repository contains functional Python PoC scripts demonstrating an authentication bypass vulnerability in Cal.com via TOTP code injection. The exploit leverages a logic flaw in the NextAuth credentials provider to skip password verification entirely.
References (1)
Related Analysis
Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
