CVE-2024-56136: /api/v1/jwt/fetch_api_key endpoint can leak if an email address has an account in Zulip server
First published: Thu Jan 16 2025(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Zulip Server | >=7.0<9.4 |
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Reference Links
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.
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