#VU109402 Improper access control in Zulip Server - CVE-2025-47930
Published: May 19, 2025
Vulnerability identifier: #VU109402
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-47930
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Zulip Server
Zulip Server
Software vendor:
Zulip
Zulip
Description
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions on creation of specific channel types. A remote user can bypass the "Who can create public channels" access control mechanism.
Remediation
Install updates from vendor's website.