CVE-2024-21630

MEDIUM EPSS 28.6%
Published Jan 25, 20242y ago · Modified Jun 17, 20262w ago
4.3 CVSS 3.1
Medium
Find Similar
Published Jan 25, 2024 2y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
4.3
Exploitability
2.8
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
28.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-862 Missing Authorization Authorization

Affected Products 2

VendorProductVersionRange
zulipzulip_server*≥1.9.0  –  <6.2
zulipzulip_server*≥8.0  –  <8.1

References 5

  • github.com https://github.com/zulip/zulip/commit/0df7bd71f32f3b772e2646c6ab0d60c9b610addf
    Patch
  • github.com https://github.com/zulip/zulip/security/advisories/GHSA-87p9-wprh-7rm6
    Vendor Advisory
  • github.com https://github.com/zulip/zulip/security/advisories/GHSA-mrvp-96q6-jpvc
    Vendor Advisory
  • zulip.com https://zulip.com/help/configure-who-can-invite-to-streams
    Product
  • zulip.com https://zulip.com/help/restrict-account-creation#change-who-can-send-invitations
    Product

Remediation

  • github.com https://github.com/zulip/zulip/commit/0df7bd71f32f3b772e2646c6ab0d60c9b610addf
    Patch