Vulnerability database
Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.
5 results
May 12, 2026YetAnotherForum.NET (YAF.NET) is a C# ASP.NET forum.CVE-2026-43939 · Other software · YAFNET · reported by GitHubHigh 7.3
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.
- Product
- YAFNET
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 12, 2026YetAnotherForum.NET (YAF.NET) is a C# ASP.NET forum.CVE-2026-43938 · Other software · YAFNET · reported by GitHubHigh 8.1
YetAnotherForum.NET (YAF.NET) is a C# ASP.NET forum. Prior to 4.0.5 and 3.2.12, the application's database logger (YAFNET.Core/Logger/DbLogger.cs) captures the incoming request's User-Agent header into a JObject, serializes it with JsonConvert, and stores the result in the EventLog.Description column whenever an event (e.g., an unhandled exception) is logged. The admin event-log page (YetAnotherForum.NET/Pages/Admin/EventLog.cshtml.cs) later deserializes that JSON in FormatStackTrace() and interpolates the UserAgent value directly into an HTML string with no encoding, and the Razor view EventLog.cshtml emits the result through @Html.Raw. This vulnerability is fixed in 4.0.5 and 3.2.12.
- Product
- YAFNET
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 12, 2026YetAnotherForum.NET (YAF.NET) is a C# ASP.NET forum.CVE-2026-43937 · Other software · YAFNET · reported by GitHubHigh 8.8
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.
- Product
- YAFNET
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Feb 2, 2023A vulnerability was found in YAFNET up to 3.1.11 and classified as problematic.CVE-2023-0650 · Other software · Yetanotherforum · reported by VulDBLow 3.5
A vulnerability was found in YAFNET up to 3.1.11 and classified as problematic. This issue affects some unknown processing of the component Signature Handler. The manipulation leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 3.1.12 is able to address this issue. The identifier of the patch is a1442a2bacc3335461b44c250e81f8d99c60735f. It is recommended to upgrade the affected component. The identifier VDB-220037 was assigned to this vulnerability.
- Product
- Yaf.net
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recorddrive.google.comgithub.com
Jan 27, 2023A vulnerability, which was classified as problematic, has been found in YAFNET up to 3.1.10.CVE-2023-0549 · Other software · Yetanotherforum · reported by VulDBLow 3.5
A vulnerability, which was classified as problematic, has been found in YAFNET up to 3.1.10. This issue affects some unknown processing of the file /forum/PostPrivateMessage of the component Private Message Handler. The manipulation of the argument subject/message leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 3.1.11 is able to address this issue. The identifier of the patch is 2237a9d552e258a43570bb478a92a5505e7c8797. It is recommended to upgrade the affected component. The identifier VDB-219665 was assigned to this vulnerability.
- Product
- Yaf.net
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recorddrive.google.comgithub.com
Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.
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