Improper access control in Zulip Server - #VU28003
Published: May 19, 2020
Vulnerability identifier: #VU28003
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions within the "invite_by_admins_only" permission. A remote authenticated attacker can bypass implemented security restrictions and gain unauthorized access to the application.
Affected software
Zulip Server
Remediation
Install updates from vendor's website.
Zulip Server - update to 1.5.2