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CVE-2025-49706 is an improper authentication vulnerability in on-premises Microsoft SharePoint that allows network-based spoofing and authentication bypass. The flaw is associated with SharePoint request handling logic in the PostAuthenticateRequestHandler method of Microsoft.SharePoint.dll. Available reporting indicates that the vulnerable logic trusted requests when the HTTP Referer header matched SharePoint sign-out paths, enabling an attacker to bypass normal authentication checks under specific request conditions. Subsequent analysis indicated the original July 2025 fix could be bypassed in some cases, leading to the related patch-bypass vulnerability CVE-2025-53771. CVE-2025-49706 was widely discussed as part of the ToolShell exploit chain, where it was combined with CVE-2025-49704 to turn authentication bypass or spoofing into broader SharePoint compromise and remote code execution against self-hosted SharePoint deployments. Affected environments were on-premises SharePoint Server deployments, while SharePoint Online was reported as not affected.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (2 hidden).
This repository contains a single Metasploit module, 'sharepoint_toolpane_rce.rb', which exploits unauthenticated remote code execution vulnerabilities in Microsoft SharePoint Server (CVE-2025-49704, CVE-2025-49706, and CVE-2025-53771). The exploit leverages a combination of authentication bypass and unsafe deserialization to execute arbitrary commands as the SharePoint site user. The module constructs a malicious serialized .NET DataSet object, compresses it, and embeds it in a crafted XML payload sent via a POST request to the '/_layouts/15/ToolPane.aspx' endpoint. The exploit is unauthenticated and weaponized, allowing for custom command execution. The code is written in Ruby and is structured as a standard Metasploit exploit module, making it easy to use within the Metasploit framework. The repository is highly focused, containing only the exploit module file, and targets vulnerable, unpatched SharePoint Server instances on Windows.
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174 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A SharePoint vulnerability referenced only as related content and not discussed in the main article.
A SharePoint Server vulnerability previously used in ToolShell attack chains to compromise servers.
SharePoint improper authentication/spoofing vulnerability that can provide the privileges needed to chain into authenticated remote code execution.
One component CVE in the ToolShell SharePoint exploit chain that enabled unauthenticated remote code execution against self-hosted SharePoint servers.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.