Unsafe Reflection in Progress Telerik UI for AJAX
CVE-2025-3600 is an unsafe reflection vulnerability in Progress Telerik UI for AJAX / ASP.NET AJAX affecting versions 2011.2.712 through 2025.1.218. The vulnerable code path is reachable via the Telerik handler endpoint /Telerik.Web.UI.WebResource.axd with type=iec. In the ImageEditorCacheHandler flow, when dkey=1 is supplied, the prtype query parameter is passed through RadImageEditor.GetICacheImageProviderType into Type.GetType, and the resolved type is then instantiated via Activator.CreateInstance in RadImageEditor.InitCacheImageProvider before being cast to ICacheImageProvider. This allows attacker-controlled selection and instantiation of available .NET types with public parameterless constructors. Progress described the issue as leading to an unhandled exception and denial of service, and public research demonstrated a reliable crash gadget on .NET Framework using System.Management.Automation.Remoting.WSManPluginManagedEntryInstanceWrapper, whose finalizer can trigger an unhandled exception when freeing an uninitialized handle. Public research further indicates that, depending on the target application's available classes, assembly resolution behavior, and surrounding application logic, the same primitive may be usable for higher-impact exploitation including remote code execution.
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Impact
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Mitigation
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Exploits
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No public exploit code observed for this vulnerability.
Affected products & vendors
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Recent activity
28 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A denial-of-service vulnerability in Progress Telerik UI for AJAX that, depending on the environment, can escalate to remote code execution.
A vulnerability in Progress Telerik UI for ASP.NET AJAX, listed as a trending CVE for the week. No further details provided.
A vulnerability in Telerik UI initially thought to be a DoS but can also be abused for remote code execution.
Unsafe reflection in Progress Telerik UI for ASP.NET AJAX (ImageEditorCacheHandler) where attacker-controlled type names are passed to Type.GetType and instantiated via Activator.CreateInstance, enabling arbitrary no-arg constructor invocation. Default impact is DoS (via .NET gadget finalizer crash), but can be escalated to RCE in certain environments by chaining with application-specific gadgets (e.g., insecure assembly resolvers) and other vulnerabilities.
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Cross-references every affected SKU, including bundled OEM variants.
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