CVE-2024-21630 Zulip non-admins can invite new users to streams they would not otherwise be able to add existing users to
Non-admin users can invite new members to streams despite admin-only restrictions, requiring specific permission configurations to exploit.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-21630?
CVE-2024-21630 is a medium-severity missing authorization vulnerability in zulip, published on 25 Jan 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Zulip is an open-source team collaboration tool. A vulnerability in version 8.0 is similar to CVE-2023-32677, but applies to multi-use invitations, not single-use invitation links as in the prior CVE. Specifically, it applies when the installation has configured non-admins to be able to invite users and create multi-use invitations, and has also configured only admins to be able to invite users to streams. As in CVE-2023-32677, this does not let users invite new users to arbitrary streams, only to streams that the inviter can already see. Version 8.1 fixes this issue. As a workaround, administrators can limit sending of invitations down to users who also have the permission to add users to streams.
Weakness: CWE-862
Which versions are affected by CVE-2024-21630?
It affects 1 product.
Products include Zulip Zulip Server.
How do I fix CVE-2024-21630?
No fix has been published for CVE-2024-21630 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2024-21630 being exploited?
There is no known exploitation of CVE-2024-21630 in the wild and no public exploit code.
Other vulnerabilities in zulip
- CVE-2019-18933 Information disclosure in n/a
- CVE-2020-15070 Code injection in n/a
- CVE-2017-0910 Missing authorization in Zulip Server
- CVE-2025-31478 Zulip Authentication Backend Configuration Bypass
- CVE-2023-33186 Cross-site scripting vulnerability in Zulip Server development branch via topic tooltip