CVE-2024-21630

Zulip non-admins can invite new users to streams they would not otherwise be able to add existing users to

Severity Score

4.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Zulip es una herramienta de colaboración en equipo de código abierto. Una vulnerabilidad en la versión 8.0 es similar a CVE-2023-32677, pero se aplica a invitaciones de usos múltiples, no a enlaces de invitación de un solo uso como en el CVE anterior. Específicamente, se aplica cuando la instalación ha configurado no administradores para poder invitar a usuarios y crear invitaciones de usos múltiples, y también ha configurado solo administradores para poder invitar a usuarios a transmisiones. Al igual que en CVE-2023-32677, esto no permite a los usuarios invitar a nuevos usuarios a transmisiones arbitrarias, solo a transmisiones que quien invita ya puede ver. La versión 8.1 soluciona este problema. Como workaround, los administradores pueden limitar el envío de invitaciones a los usuarios que también tienen permiso para agregar usuarios a las transmisiones.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-12-29 CVE Reserved
2024-01-25 CVE Published
2024-08-01 CVE Updated
2025-04-15 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-862: Missing Authorization

CAPEC

References (5)

URL	Tag	Source
https://zulip.com/help/configure-who-can-invite-to-streams	Product
https://zulip.com/help/restrict-account-creation#change-who-can-send-invitations	Product

URL	Date	SRC

URL	Date	SRC
https://github.com/zulip/zulip/commit/0df7bd71f32f3b772e2646c6ab0d60c9b610addf	2024-01-31

URL	Date	SRC
https://github.com/zulip/zulip/security/advisories/GHSA-87p9-wprh-7rm6	2024-01-31
https://github.com/zulip/zulip/security/advisories/GHSA-mrvp-96q6-jpvc	2024-01-31

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Zulip Search vendor "Zulip"		Zulip Server Search vendor "Zulip" for product "Zulip Server"				>= 1.9.0 < 6.2 Search vendor "Zulip" for product "Zulip Server" and version " >= 1.9.0 < 6.2"		-		Affected
Zulip Search vendor "Zulip"		Zulip Server Search vendor "Zulip" for product "Zulip Server"				>= 8.0 < 8.1 Search vendor "Zulip" for product "Zulip Server" and version " >= 8.0 < 8.1"		-		Affected