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Vulnerability record · CVE-2026-43937 · published 12 May 2026

CVE-2026-43937: SQL injection vulnerability

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.

8.8 CVSS 3.1 High EPSS 0.64% · top 51.5% CWE-89 · SQL injectionCWE-841 · CWE-841 Deferred
8.8CVSS 3.1 base score
0.64%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/YAFNET/YAFNET/security/advisories/GHSA-xhw7-j96h-c3g5
https://github.com/YAFNET/YAFNET/security/advisories/GHSA-xhw7-j96h-c3g5

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Source: NIST National Vulnerability Database (record CVE-2026-43937), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.