WikiDiscover is an extension designed for use with a CreateWiki managed farm to display wikis. On Special:WikiDiscover, the Language::date function is used when making the human-readable timestamp for inclusion on the wikicreation column. This function uses interface messages to translate the names of months and days. It uses the ->text() output mode, returning unescaped interface messages. Since the output is not escaped later, the unescaped interface message is included on the output, resulting in an XSS vulnerability. Exploiting this on-wiki requires the (editinterface) right. This vulnerability has been addressed in commit 267e763a0. Users are advised to update their installations. There are no known workarounds for this vulnerability.

WikiDiscover is an extension designed for use with a CreateWiki managed farm to display wikis. Special:WikiDiscover is a special page that lists all wikis on the wiki farm. However, the special page does not make any effort to escape the wiki name or description. Therefore, if a wiki sets its name and/or description to an XSS payload, the XSS will execute whenever the wiki is shown on Special:WikiDiscover. This issue has been patched with commit 2ce846dd93 and all users are advised to apply that patch. User unable to upgrade should block access to Special:WikiDiscover.