CVE-2026-43937 YAF.NET: Pre-Handler Authorization Bypass on Admin Pages Enabling Blind SQL Execution via `/Admin/RunSql`

YetAnotherForum.NET YAF.NET is a C ASP.NET forum. Prior to 4.0.5, Any admin OnPost… handler executes its side effects before the ResultFilterAttribute rewrites the response to a 302 to /Info/4. The most impactful abuse is /Admin/RunSql, whose OnPostRunQuery binds Editor from the POST body and...

YAFNET: Pre-Handler Authorization Bypass on Admin Pages Enables Blind SQL Execution via `/Admin/RunSql`

Issue Details: YAFNET's only admin authorization gate is PageSecurityCheckAttribute, implemented as a ResultFilterAttribute that runs after the page handler completes rather than before it. No other gate exists. Any admin OnPost… handler therefore executes its side effects before the filter...