Auth bypass in Zulip Server
CVE-2017-0896
Zulip Server 1.5.1 and below suffer from an error in the implementation of the invite_by_admins_only setting in the Zulip group chat application server that allowed an authenticated user to invite other users to join a Zulip organization even if the organization was configured to prevent this.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.013 (69.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Zulip Server — versions 1.5.1 and below
- Zulip Server — versions 1.3.0, 1.3.1, 1.3.2
Weakness classification (CWE)
References
- groups.google.com/forum/ (mailing-list)
- hackerone.com/reports/224210 (Permissions Required)
- github.com/zulip/zulip/commit/1f48fa27672170bba3b9a97384905bb04c18761b (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2017-0896?
- CVE-2017-0896 is a medium-severity vulnerability in Zulip Server, classified under Improper Authorization. CVSS score: 6.5/10. Published 2017-06-02.
- How severe is CVE-2017-0896?
- Medium severity. CVSS v3 base score is 6.5 out of 10.