SB2023111746 - Improper access control in Zulip Server
Published: November 17, 2023
Security Bulletin ID
SB2023111746
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper access control (CVE-ID: CVE-2023-47642)
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 update from vendor's website.