CVE-2025-53770 PoC — Microsoft SharePoint Server Remote Code Execution Vulnerability

Source

https://github.com/grupooruss/CVE-2025-53770-Checker

Associated Vulnerability

Title:Microsoft SharePoint Server Remote Code Execution Vulnerability (CVE-2025-53770)
Description:Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild. Microsoft is preparing and fully testing a comprehensive update to address this vulnerability. In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.

Description

Comprueba si un servidor SharePoint on-premises es vulnerable a CVE-2025-53770

Readme

# CVE-2025-53770-Checker
Comprueba si un servidor SharePoint on-premises es vulnerable a CVE-2025-53770

**Detector no intrusivo** de la vulnerabilidad CVE-2025-53770 en SharePoint Server  
Desarrollo: Division81 (equipo de hackers éticos de Grupo Oruss)

## Descripción técnica

- **CVE-2025-53770** es un fallo crítico de deserialización de .NET en el gestor de ViewState de SharePoint on-premises que permite RCE sin autenticación :contentReference[oaicite:1]{index=1}.
- El exploit emplea un POST a `/ _layouts/15/ToolPane.aspx?DisplayMode=Edit` con payloads de ViewState maliciosos (firmados) que desatan `SerializationException` y suelen escribir web shells (`spinstall0.aspx`) en la carpeta LAYOUTS :contentReference[oaicite:2]{index=2}.
- Parte de la “ToolShell” exploit chain junto a CVE-2025-49706 y CVE-2025-49704, utilizada en campañas APT recientes :contentReference[oaicite:3]{index=3}.

## Requisitos

- Python ≥ 3.7  
- Módulo `requests` (`pip install requests`)

## Uso

git clone https://github.com/tu-org/division81-sp-checker.git
cd division81-sp-checker
pip install -r requirements.txt
python check_sp_cve2025_53770.py https://sharepoint.local/ -e 2019


## Referencias

MSRC Blog: Customer guidance for SharePoint vulnerability CVE-2025-53770
https://msrc.microsoft.com/blog/2025/07/customer-guidance-for-sharepoint-vulnerability-cve-2025-53770/

## Licencia

**MIT © Grupo Oruss – Division81**

File Snapshot


 [4.0K]  /data/pocs/5a3c07b771f4779825c7ea4b6f84086be56a3b1e
├── [4.2K]  checker CVE-2025-53770.py
└── [1.4K]  README.md

0 directories, 2 files

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