CVE-2023-47642 : Vulnerability Insights and Analysis
Discover how CVE-2023-47642 exposes Zulip users to sensitive stream information and learn the steps to mitigate this security risk. Upgrade to version 7.5 for protection.
A data exposure vulnerability in Zulip could allow ex-subscribers to access sensitive stream information. Find out more about the impact, technical details, and mitigation steps below.
Understanding CVE-2023-47642
Zulip, an open-source team collaboration tool, was found to have a security flaw that allowed ex-subscribers to view sensitive stream details through the API.
What is CVE-2023-47642?
The vulnerability in Zulip enabled active users who were previously subscribed to a stream to continue accessing metadata even after being removed from the stream, potentially exposing stream settings and email addresses.
The Impact of CVE-2023-47642
This security issue could lead to unauthorized users viewing stream metadata, including sensitive information, after losing access to the stream. It poses a risk to the confidentiality of data within the organization.
Technical Details of CVE-2023-47642
Learn more about the specifics of this vulnerability affecting Zulip.
Vulnerability Description
Active users who had been unsubscribed from a stream could still access and view metadata, such as stream names, descriptions, settings, and email addresses used for incoming email integration.
Affected Systems and Versions
Zulip versions greater than or equal to 1.3.0 and less than 7.5 are impacted by this vulnerability, with version 7.5 containing the fix.
Exploitation Mechanism
By leveraging the Zulip API, unauthorized ex-subscribers could continue to access stream metadata, potentially leading to privacy breaches.
Mitigation and Prevention
Discover the necessary steps to address and prevent CVE-2023-47642.
Immediate Steps to Take
All users are strongly advised to upgrade to Zulip version 7.5 or newer to mitigate the risk of data exposure due to this vulnerability.
Long-Term Security Practices
Regularly updating Zulip to the latest version, implementing access controls, and monitoring API usage can help prevent similar security issues in the future.
Patching and Updates
Stay informed about security advisories and promptly apply patches released by Zulip to ensure your system remains secure.