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Advisories

stoatchat before 0.15.5 MFA Brute Force via Insufficient Rate Limiting

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severity
high
date
Affecting

  • stoatchat >= 0, < 0.15.5

CWE
  • CWE-307 Improper Restriction of Excessive Authentication Attempts
CVSS
8.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Credit
QuentinRa
Description
stoatchat before 0.15.5 fails to enforce account-level attempt limits on MFA login challenges, allowing attackers who know a password to guess TOTP codes with only IP-based rate limiting. Attackers can reuse MFA challenge tickets across multiple failed attempts and distribute guesses across IP addresses to bypass rate limiting and gain account access.

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