CVE-2026-43937

Summary: CVE-2026-43937 affects YetAnotherForum.NET (YAF.NET) prior to 4.0.5. An admin handler (OnPost… in /Admin/RunSql) can bypass authorization due to PageSecurityCheckAttribute executing after the handler, allowing arbitrary SQL execution via IDbAccess.RunSql when a low-privileged user posts ...

GHSA-XHW7-J96H-C3G5 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...