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Missing rate limit on signup page (NC-SA-2020-033)

3rd August 2020

Risk level: Low

CVSS v3 Base Score: 3.5 (AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L)

CWE: Business Logic Errors (CWE-840)

HackerOne report: 922470


A missing rate limit in the Preferred Providers app 1.7.0 allowed an attacker to set the password an uncontrolled amount of times.

Affected Software

  • Nextcloud Preferred_providers < 1.8.0 (CVE-2020-8228)

Action Taken

The error has been fixed.


It is recommended that the Preferred Providers app is upgraded to 1.8.0.


The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory:

  • Faeeq jalali ( - Vulnerability discovery and disclosure.

This advisory is licensed CC BY-SA 4.0.

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