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 wiki_creation 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.

GitHub, Inc. AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

GitHub, Inc. CWE-79

GitHub, Inc. https://github.com/miraheze/WikiDiscover/commit/267e763a0d7460f001693c42f67717a0fc3fd6bb [No types assigned]

GitHub, Inc. https://github.com/miraheze/WikiDiscover/security/advisories/GHSA-cfcf-94jv-455f [No types assigned]

GitHub, Inc. https://issue-tracker.miraheze.org/T11814 [No types assigned]