Vulnerability identifier: #VU30996

Vulnerability risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-12469

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MediaWiki
Web applications / CMS

Vendor: MediaWiki.org

Description

The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions. A remote attacker can send a specially crafted request and gain unauthorized access to the affected application.

Mitigation
Update to version 1.32.2.

Vulnerable software versions

MediaWiki: 1.32.0 - 1.32.1

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External links
http://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html
http://phabricator.wikimedia.org/T222036
http://seclists.org/bugtraq/2019/Jun/12
http://www.debian.org/security/2019/dsa-4460

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.