Auth bypass in Nextcloud Server
CVE-2017-0936
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.008 (53.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: -0.000
Affected products
- Nextcloud Server — versions before 11.0.7 and 12.0.5
- Nextcloud Server — versions 12.0.5
Weakness classification (CWE)
References
- hackerone.com/reports/297751 (Third Party Advisory)
- nextcloud.com/security/advisory/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2017-0936?
- CVE-2017-0936 is a medium-severity vulnerability in Nextcloud Server, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.7/10. Published 2018-03-28.
- How severe is CVE-2017-0936?
- Medium severity. CVSS v3 base score is 5.7 out of 10.