GHSA-89V6-J5X6-CMJ3 YesWiki: SQL injection via the `recentchanges` action `period` argument leads to arbitrary DB read

Summary The recentchanges action actions/recentchanges.php accepts a period argument from two disjoint parameter spaces: the URL query string $GET'period' and the action invocation recentchanges period="...". A whitelist at line 17 validates only the URL form against 'day','week','month'. The...