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CVE-2025-53771 is an improper limitation of a pathname to a restricted directory vulnerability in on-premises Microsoft Office SharePoint Server. The flaw permits an unauthorized network attacker to perform spoofing by abusing insufficient path validation involving sensitive files. It was issued as a patch-bypass fix associated with CVE-2025-49706 and has been used in the broader ToolShell exploitation chain. Affected products include SharePoint Server 2016, SharePoint Server 2019, and SharePoint Server Subscription Edition; SharePoint Online is not affected.
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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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185 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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Every observed campaign linking this CVE to a named adversary.
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.