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CVE-2025-53771 is a Microsoft Office SharePoint vulnerability affecting on-premises SharePoint Server deployments. It is described as an improper limitation of a pathname to a restricted directory, resulting in a path traversal condition that enables spoofing over the network. The issue is associated with improper authentication behavior in SharePoint request handling and was released as a bypass fix for the earlier CVE-2025-49706 patch. Reporting on the ToolShell exploit chain indicates that the vulnerable logic involved authentication-skipping behavior tied to sign-out referrer handling, and that the updated fix replaced narrow request checks with a stricter allowlist approach. In observed attack chains, CVE-2025-53771 was used together with SharePoint remote code execution flaws, especially CVE-2025-53770, to remove authentication requirements and support full compromise of self-hosted SharePoint servers.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (3 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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181 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Patch bypass vulnerability related to CVE-2025-49706; the content says full protection requires patching this issue as well.
One component CVE in the ToolShell SharePoint exploit chain that enabled unauthenticated remote code execution against self-hosted SharePoint servers.
A July 2025 Microsoft SharePoint deserialization vulnerability referenced as part of the product's recent exploitation history.
A Microsoft SharePoint Server vulnerability used in combination with CVE-2025-53770 in the ToolShell exploit chain and exploited in the wild.
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Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.