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GHSA-2v3v-3whp-953h
No affected components available
Summary
Various date messages returned by Language::userDate are inserted into raw HTML, allowing anybody who can edit those messages to insert arbitrary HTML into the DOM.
Details
The result of $this->lang->userDate( $timestamp, $this->user ) returns unescaped values, but is inserted as raw HTML by Citizen:
https://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/072e4365e9084e4b153eac62d3666566c06f5a49/includes/Components/CitizenComponentUserInfo.php#L55-L60
PoC
- Go to any page using citizen with the uselang parameter set to x-xss and while being logged in
Depending on the registration date of the account you're logged in with, various messages can be shown. In my case, it's
november:
Impact
This impacts wikis where a group has the editinterface but not the editsitejs user right.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs high-level or administrative privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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