Vulnerability identifier: #VU74228

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-29141

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 attacker to gain access to potentially sensitive information.

The vulnerability exists due to way application handles the X-Forwarded-For header. A remote attacker can use the X-Forwarded-For header to brute-force the autoblocked IP addresses.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MediaWiki: 1.39.0 - 1.39.2, 1.38.0 - 1.38.5, 1.37.0 - 1.37.6, 1.36.0 - 1.36.4, 1.35 - 1.35.9

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External links
http://lists.wikimedia.org/hyperkitty/list/mediawiki-announce@lists.wikimedia.org/thread/6UQBHI5FWLATD7QO7DI4YS54U7XSSLAN/

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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.