CVE-2021-47819 — AI Deep Analysis Summary

Q: Root Cause? (CWE/Flaw)

🔍 **Root Cause**: **CWE-434** (Unrestricted Upload of File with Dangerous Type). 🛠️ **Flaw**: The application fails to properly verify uploaded files, allowing malicious scripts to be executed directly.

Q: Who is affected? (Versions/Components)

👥 **Affected**: **ProjeQtOr Project Management** software. 📦 **Version**: Specifically **v9.1.4**. 🏢 **Vendor**: ProjeQtOr (French company).

Q: What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: Full **Remote Code Execution (RCE)**. 🔓 **Privileges**: Gains control over the server. 📊 **Data**: Can read, modify, or delete all project data and user information.

Q: Is exploitation threshold high? (Auth/Config)

⚠️ **Threshold**: **LOW**. 🔑 **Auth**: **None required** (PR:N). 🖱️ **UI**: **None required** (UI:N). 🌐 **Network**: **Remote** (AV:N). 📉 **Complexity**: **Low** (AC:L).

Q: Is there a public Exp? (PoC/Wild Exploitation)

💣 **Public Exploit**: **YES**. 📂 **Source**: ExploitDB ID **49919**. 🔥 **Status**: Wild exploitation is possible since the PoC is available.

Q: Is it urgent? (Priority Suggestion)

🔴 **Urgency**: **CRITICAL**. 📈 **Priority**: **P1**. 🚀 **Reason**: CVSS Score is **9.1** (High). Remote, unauthenticated, and easy to exploit. Immediate action required!

Updated May 06, 2026 CVSS 9.8 · Critical

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: ProjeQtOr 9.1.4 has a critical flaw in file upload validation. <br>💥 **Consequences**: Attackers can execute **arbitrary code** on the server.…

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Q2Root Cause? (CWE/Flaw)

🔍 **Root Cause**: **CWE-434** (Unrestricted Upload of File with Dangerous Type). <br>🛠️ **Flaw**: The application fails to properly verify uploaded files, allowing malicious scripts to be executed directly.

Q3Who is affected? (Versions/Components)

👥 **Affected**: **ProjeQtOr Project Management** software. <br>📦 **Version**: Specifically **v9.1.4**. <br>🏢 **Vendor**: ProjeQtOr (French company).

Q4What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: Full **Remote Code Execution (RCE)**. <br>🔓 **Privileges**: Gains control over the server. <br>📊 **Data**: Can read, modify, or delete all project data and user information.

Q5Is exploitation threshold high? (Auth/Config)

⚠️ **Threshold**: **LOW**. <br>🔑 **Auth**: **None required** (PR:N). <br>🖱️ **UI**: **None required** (UI:N). <br>🌐 **Network**: **Remote** (AV:N). <br>📉 **Complexity**: **Low** (AC:L).

Q6Is there a public Exp? (PoC/Wild Exploitation)

💣 **Public Exploit**: **YES**. <br>📂 **Source**: ExploitDB ID **49919**. <br>🔥 **Status**: Wild exploitation is possible since the PoC is available.

Q7How to self-check? (Features/Scanning)

🔎 **Self-Check**: Scan for **ProjeQtOr v9.1.4** instances. <br>📂 **Feature**: Check if the **file upload** endpoint accepts executable files (e.g., .php, .jsp) without strict validation.…

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Q8Is it fixed officially? (Patch/Mitigation)

🛡️ **Official Fix**: The data does not list a specific patch version. <br>📝 **Action**: Check the [Official Website](https://www.projeqtor.org) for updates.…

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Q9What if no patch? (Workaround)

🚧 **Workaround**: If no patch exists: <br>1. **Disable** file upload features if not needed. <br>2. Implement **WAF rules** to block malicious file extensions. <br>3.…

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Q10Is it urgent? (Priority Suggestion)

🔴 **Urgency**: **CRITICAL**. <br>📈 **Priority**: **P1**. <br>🚀 **Reason**: CVSS Score is **9.1** (High). Remote, unauthenticated, and easy to exploit. Immediate action required!

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Vulnerability detail Full AI analysis (login) Projeqtor CWE-434