Mautic allows user name enumeration due to response time difference on password reset form

Summary

This advisory addresses a security vulnerability in Mautic related to the "Forget your password" functionality. This vulnerability could be exploited by unauthenticated users to enumerate valid usernames.

User Enumeration via Timing Attack: A user enumeration vulnerability exists in the "Forget your password" functionality. Differences in response times for existing and non-existing users, combined with a lack of request limiting, allow an attacker to determine the existence of usernames through a timing-based attack.

Mitigation

Please update to a version that addresses this timing vulnerability, where password reset responses are normalized to respond at the same time regardless of user existence.

Workarounds

None

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