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 passes it straight to IDbAccess.RunSql with no caller check, yielding arbitrary SQL execution for any low-privileged user. This vulnerability is fixed in 4.0.5.
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Tue, 12 May 2026 16:15:00 +0000
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Tue, 12 May 2026 15:00:00 +0000
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| Description | 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 passes it straight to IDbAccess.RunSql with no caller check, yielding arbitrary SQL execution for any low-privileged user. This vulnerability is fixed in 4.0.5. | |
| Title | YAF.NET: Pre-Handler Authorization Bypass on Admin Pages Enabling Blind SQL Execution via `/Admin/RunSql` | |
| Weaknesses | CWE-841 CWE-89 |
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cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-05-12T15:42:43.601Z
Reserved: 2026-05-04T16:59:09.089Z
Link: CVE-2026-43937
Updated: 2026-05-12T15:41:02.427Z
Status : Received
Published: 2026-05-12T15:16:15.327
Modified: 2026-05-12T16:16:18.740
Link: CVE-2026-43937
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