#VU83257 Improper access control in Zulip Server - CVE-2023-47642
Published: November 17, 2023
Vulnerability identifier: #VU83257
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-47642
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 user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. Active users who had previously been subscribed to a stream incorrectly
continued being able to use the Zulip API to access metadata for that
stream after they were removed from the stream.
Remediation
Install updates from vendor's website.