Medium severity · published Jun 2, 2017
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…
6.5
CVSS
1.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 70% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZS
Zulip Server · Zulip
1.5.1 and below · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-0896
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-0896
Issue Tracking
https://github.com/zulip/zulip/commit/1f48fa27672170bba3b9a97384905bb04c18761b
groups.google.com
https://groups.google.com/forum/#%21msg/zulip-announce/sUYeJv-fFmg/2TU2TLmNAwAJ
Permissions Required
https://hackerone.com/reports/224210
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