CVE-2024-56136: /api/v1/jwt/fetch_api_key endpoint can leak if an email address has an account in Zulip server
Zulip server provides an open-source team chat that helps teams stay productive and focused. Zulip Server 7.0 and above are vulnerable to an information disclose attack, where, if a Zulip server is hosting multiple organizations, an unauthenticated user can make a request and determine if an email address is in use by a user. Zulip Server 9.4 resolves the issue, as does the main branch of Zulip Server. Users are advised to upgrade. There are no known workarounds for this issue.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2024-56136?
CVE-2024-56136 is classified as a medium severity vulnerability due to its potential for information disclosure.
How do I fix CVE-2024-56136?
To remediate CVE-2024-56136, it is recommended to update Zulip Server to version 9.4 or above.
What kind of attack does CVE-2024-56136 enable?
CVE-2024-56136 enables an unauthenticated user to exploit information disclosure across multiple organizations hosted on a Zulip server.
Which versions of Zulip Server are affected by CVE-2024-56136?
Zulip Server versions 7.0 through 9.3 are affected by CVE-2024-56136.
Can I mitigate CVE-2024-56136 without upgrading?
Mitigation options are limited, and upgrading to a secure version is the recommended approach to resolve CVE-2024-56136.