Vulnerability identifier: #VU87651

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-27286

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Zulip Server
Web applications / Other software

Vendor: Zulip

Description

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to an error in the moving messages feature when moving messages between stream or unsubscribing users from a stream. A remote user who previously had access to a stream can continue reading messages.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Zulip Server: 3.0 - 8.2

---

External links
http://github.com/zulip/zulip/security/advisories/GHSA-478x-rfqr-w4jf

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.