CVE-2020-27386 — AI Deep Analysis Summary

🚨 **Essence**: A critical code flaw in FlexDotnetCMS allowing arbitrary file uploads. 📉 **Consequences**: Attackers can upload malicious ASP files, leading to **Remote Code Execution (RCE)** and full server compromise.…

🛡️ **Root Cause**: Improper validation of file extensions during rename operations.…

🎯 **Affected Product**: MacdonaldRobinson FlexDotnetCMS. 📦 **Specific Version**: **v1.5.9** (and likely earlier versions like v1.5.8). 🧑‍💻 **Developer**: MacdonaldRobinson (Individual Developer).…

🔓 **Privileges**: Gains **Remote Code Execution** capabilities. 📂 **Data Access**: Can execute arbitrary code on the server. 🕵️‍♂️ **Action**: Uploads malicious ASP scripts disguised as harmless files.…

🔑 **Auth Required**: **YES**. ⚠️ **Threshold**: Medium. The attacker must be an **authenticated** user. 🚪 **Access**: Needs access to the 'FileEditor' or file management interface.…

🔥 **Public Exploit**: **YES**. 📜 **References**: Exploits available on PacketStorm and GitHub (Metasploit Framework PR #14339). 🌍 **Wild Exploitation**: Likely active given the simplicity of the rename trick.…

🔍 **Self-Check**: Scan for FlexDotnetCMS instances. 📂 **Feature Test**: Check if 'FileEditor' allows renaming .txt to .asp. 📡 **Scanner**: Use tools detecting ASP.NET CMS vulnerabilities.…

🩹 **Official Patch**: **YES**. 📅 **Date**: Released around Nov 12, 2020. 📌 **Version**: Check for updates beyond v1.5.9. 🔄 **Action**: Update to the latest secure version immediately.…

🚧 **Workaround**: Disable the 'FileEditor' feature if possible. 🚫 **Restriction**: Prevent renaming of uploaded files via admin panel. 🛡️ **WAF**: Block requests attempting to rename files to .asp/.aspx extensions.…

⚡ **Priority**: **HIGH**. 🚨 **Urgency**: Critical due to RCE potential. 📉 **Risk**: Easy exploitation for authenticated users. 🏃 **Action**: Patch immediately or apply strict file upload restrictions.…