Vulnerability identifier: #VU31009

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-12474

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MediaWiki
Web applications / CMS

Vendor: MediaWiki.org

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

Wikimedia MediaWiki 1.23.0 through 1.32.1 has an information leak. Privileged API responses that include whether a recent change has been patrolled may be cached publicly. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Mitigation
Install update from vendor's website.

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/T212118
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.