Tilesheets MediaWiki Extension adds a table lookup parser function for an item and returns the requested image. A missing backtick in a query executed by the Tilesheets extension allows users to insert and potentially execute malicious SQL code. This issue has not been fixed.
The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.