ManageWiki is an extension to the MediaWiki project. The 'wikiconfig' API leaked the value of private configuration variables set through the ManageWiki variable to all users. This has been patched by https://github.com/miraheze/ManageWiki/compare/99f3b2c8af18...befb83c66f5b.patch. If you are unable to patch set $wgAPIListModules['wikiconfig'] = 'ApiQueryDisabled'; or remove private config as a workaround.

ManageWiki is a MediaWiki extension allowing users to manage wikis. Special:ManageWiki does not escape escape interface messages on the columns and help keys on the form descriptor. An attacker may exploit this and would have a cross site scripting attack vector. Exploiting this on-wiki requires the (editinterface) right. Users should apply the code changes in commits 886cc6b94, 2ef0f50880, and 6942e8b2c to resolve this vulnerability. There are no known workarounds for this vulnerability.