CVE-2024-21630
Zulip non-admins can invite new users to streams they would not otherwise be able to add existing users to
- State
- Published
- Severity
- 4.3 Medium
- Published
- Jan 25, 2024
- Updated
- May 29, 2025
- Reserved
- Dec 29, 2023
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | GitHub_M |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
zulipzulip |
|
References
- https://github.com/zulip/zulip/security/advisories/GHSA-87p9-wprh-7rm6
- https://github.com/zulip/zulip/security/advisories/GHSA-mrvp-96q6-jpvc
- https://github.com/zulip/zulip/commit/0df7bd71f32f3b772e2646c6ab0d60c9b610addf
- https://zulip.com/help/configure-who-can-invite-to-streams
- https://zulip.com/help/restrict-account-creation#change-who-can-send-invitations
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.