MediaWiki up to 1.35.6/1.37.2/1.38.0 Welcome successfulAction Username escape output

Summaryinfo

A vulnerability, which was classified as critical, has been found in MediaWiki up to 1.35.6/1.37.2/1.38.0. Affected is the function SpecialCreateAccount::successfulAction of the component Welcome Handler. Performing a manipulation of the argument Username results in escape output. This vulnerability is cataloged as CVE-2022-34911. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in MediaWiki up to 1.35.6/1.37.2/1.38.0 (Content Management System). This affects the function SpecialCreateAccount::successfulAction of the component Welcome Handler. The manipulation of the argument username with an unknown input leads to a escape output vulnerability. CWE is classifying the issue as CWE-116. The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in MediaWiki before 1.35.7, 1.36.x and 1.37.x before 1.37.3, and 1.38.x before 1.38.1. XSS can occur in configurations that allow a JavaScript payload in a username. After account creation, when it sets the page title to "Welcome" followed by the username, the username is not escaped: SpecialCreateAccount::successfulAction() calls ::showSuccessPage() with a message as second parameter, and OutputPage::setPageTitle() uses text().

The weakness was shared 07/03/2022. The advisory is shared at phabricator.wikimedia.org. This vulnerability is uniquely identified as CVE-2022-34911 since 07/02/2022. Technical details are known, but no exploit is available.

Upgrading to version 1.35.7, 1.37.3 or 1.38.1 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Content Management System

Name

• MediaWiki

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.35
• 1.35.0
• 1.35.1
• 1.35.2
• 1.35.3
• 1.35.4
• 1.35.5
• 1.35.6
• 1.36
• 1.37
• 1.37.0
• 1.37.1
• 1.37.2
• 1.38.0

License

• open-source

Website

• Product: https://www.mediawiki.org/wiki/MediaWiki

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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