Vulnerability identifier: #VU54642

Vulnerability risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-36132

CWE-ID: CWE-285

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MediaWiki
Web applications / CMS

Vendor: MediaWiki.org

Description

The vulnerability allows a remote attacker to bypass authorization checks.

The vulnerability exists due to improper authorization enforcement in the FileImporter extension. A remote authenticated attacker can perform operations (specifically file uploads) that they should not be allowed to perform.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MediaWiki: 1.36.0, 1.31.0 - 1.31.14, 1.35.0 - 1.35.2

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External links
http://phabricator.wikimedia.org/T280590
http://gerrit.wikimedia.org/r/q/I8ff2a67abd2c118a3469e4410eac2a451bfa76c3

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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.