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Improper access control to messages of Social app (NC-SA-2020-042)

15th October 2020

Risk level: Low

CVSS v3 Base Score: 5 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N)

CWE: Improper Access Control - Generic (CWE-284)

HackerOne report: 921717


Improper access control in Social app 0.3.1 allowed to read posts of any user.

Affected Software

  • Nextcloud Social < 0.4.0 (CVE-2020-8278)

Action Taken

The error has been fixed.


It is recommended that the Social app is upgraded to 0.4.0.


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

This advisory is licensed CC BY-SA 4.0.

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