Vulnerability CVE-2017-0910
Published: 2017-11-27

Description:
In Zulip Server before 1.7.1, on a server with multiple realms, a vulnerability in the invitation system lets an authorized user of one realm on the server create a user account on any other realm.

Type:

CWE-287

 (Improper Authentication)

CVSS2 => (AV:N/AC:L/Au:S/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4/10
2.9/10
8/10
Exploit range
Attack complexity
Authentication
Remote
Low
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Zulip -> Zulip server 

 References:
http://blog.zulip.org/2017/11/23/zulip-1-7-1-released/
https://github.com/zulip/zulip/commit/960d736e55cbb9386a68e4ee45f80581fd2a4e32
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