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 ...

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...

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...