Vulnerability identifier: #VU65857

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-31134

CWE-ID: CWE-264

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 access to sensitive information.

The vulnerability exists due to improper privilege management in the export public data feature. As a result, all privately uploaded files were made accessible during export, including files from private messages.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Zulip Server: 2.1.0 - 5.3

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External links
http://blog.zulip.com/2022/07/12/zulip-cloud-data-exports
http://github.com/zulip/zulip/security/advisories/GHSA-58pm-88xp-7x9m
http://blog.zulip.com/2022/07/12/zulip-server-5-4-security-release

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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.