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CVE-2026-43939

YAF.NET: Stored XSS in Forum Thread Posts/Replies Allowing Arbitrary JavaScript Execution for All Thread Viewers PUBLISHED

Description (CNA)

YetAnotherForum.NET (YAF.NET) is a C# ASP.NET forum. Prior to 4.0.5 and 3.2.12, the thread posting and reply feature accepts user-supplied content via a a post or reply that is stored server-side and later rendered back into the thread page without adequate HTML sanitization or contextual output encoding. This vulnerability is fixed in 4.0.5 and 3.2.12.

Affected (CNA)

Vendor / productVersions
YAFNET / YAFNETaffected >= 4.0.0-beta.1, < 4.0.5; affected < 3.2.12

CWE

CWE-79, CWE-80, CWE-116

References

ADP enrichment

CISA-ADP

No English description supplied.