CVE-2024-47781: Cross-site Scripting (XSS) in Special:RequestWikiQueue when displaying sitename in CreateWiki

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-10-07 · updated 2026-06-17
Weakness: CWE-79

Description

CreateWiki is an extension used at Miraheze for requesting & creating wikis. The name of requested wikis is not escaped on Special:RequestWikiQueue, so a user can insert arbitrary HTML that is displayed in the request wiki queue when requesting a wiki. If a wiki creator comes across the XSS payload, their user session can be abused to retrieve deleted wiki requests, which typically contains private information. Likewise, this can also be abused on those with the ability to suppress requests to view sensitive information. This issue has been patched with commit `693a220` and all users are advised to apply the patch. Users unable to upgrade should disable Javascript and/or prevent access to the vulnerable page (Special:RequestWikiQueue).

Affected products

miraheze CreateWiki: from 2018-11-07 before 2024-10-07 — fixed in 2024-10-07

How to fix

Upgrade to a fixed version: miraheze CreateWiki 2024-10-07. Check the vendor advisory for mitigations.

References

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