CVE-2017-0936

Severity: medium (CVSS 5.7 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-03-28 · updated 2026-06-17
Weakness: CWE-639

Description

Nextcloud Server before 11.0.7 and 12.0.5 suffers from an Authorization Bypass Through User-Controlled Key vulnerability. A missing ownership check allowed logged-in users to change the scope of app passwords of other users. Note that the app passwords themselves where neither disclosed nor could the error be misused to identify as another user.

Affected products

Nextcloud Server: before 11.0.7; 12.0.5 — fixed in 11.0.7

How to fix

Upgrade to a fixed version: Nextcloud Server 11.0.7. Check the vendor advisory for mitigations.

References

https://hackerone.com/reports/297751
https://nextcloud.com/security/advisory/?id=nc-sa-2018-001
https://hackerone.com/reports/297751
https://nextcloud.com/security/advisory/?id=nc-sa-2018-001

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