CVE-2026-0740 — AI Deep Analysis Summary

Q: Who is affected? (Versions/Components)

📦 **Affected**: **Ninja Forms - File Uploads** plugin. 📉 **Version**: **3.3.26 and earlier**. 🌐 **Platform**: WordPress sites running this specific plugin version.

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

💀 **Hackers Can**: 1. Upload **Webshells/Backdoors**. 2. Execute **Remote Code (RCE)**. 3. Steal **Sensitive Data** (C:H). 4. Modify **Site Content** (I:H). 5. **Take Down** the server (A:H).

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

⚡ **Threshold**: **LOW**. 🔓 **Auth**: **None Required** (PR:N). 🌍 **Access**: **Network** (AV:N). 👤 **UI**: **None** (UI:N). 🎯 **Easy to exploit** for anyone.

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

📜 **Public Exp?**: **No PoC provided** in data. 🕵️ **Status**: References link to NinjaForms & Wordfence. ⚠️ **Risk**: High CVSS suggests **wild exploitation likely** soon due to low barrier.

Q: Is it fixed officially? (Patch/Mitigation)

🛠️ **Fix**: Update to **version 3.3.27+** (implied). 📥 **Source**: Official NinjaForms extension page. ✅ **Action**: Patch immediately to close the validation gap.

Q: Is it urgent? (Priority Suggestion)

🔴 **Priority**: **CRITICAL (P1)**. ⏱️ **Urgency**: **Immediate**. 📉 **CVSS**: **9.8** (Critical). 🚀 **Action**: Patch NOW. No auth needed makes this an instant target for bots.

Updated May 06, 2026 CVSS 9.8 · Critical

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Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Ninja Forms < 3.3.26 has a **Code Issue** in `handle_upload`. <br>🔥 **Consequences**: No file type validation. Leads to **Full System Compromise** (CVSS 9.8).…

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Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-434** (Unrestricted Upload of File with Dangerous Type). <br>❌ **Flaw**: `NF_FU_AJAX_Controllers_Uploads::handle_upload` skips **file extension/type checks**.…

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Q3Who is affected? (Versions/Components)

📦 **Affected**: **Ninja Forms - File Uploads** plugin. <br>📉 **Version**: **3.3.26 and earlier**. <br>🌐 **Platform**: WordPress sites running this specific plugin version.

Q4What can hackers do? (Privileges/Data)

💀 **Hackers Can**: <br>1. Upload **Webshells/Backdoors**. <br>2. Execute **Remote Code (RCE)**. <br>3. Steal **Sensitive Data** (C:H). <br>4. Modify **Site Content** (I:H). <br>5. **Take Down** the server (A:H).

Q5Is exploitation threshold high? (Auth/Config)

⚡ **Threshold**: **LOW**. <br>🔓 **Auth**: **None Required** (PR:N). <br>🌍 **Access**: **Network** (AV:N). <br>👤 **UI**: **None** (UI:N). <br>🎯 **Easy to exploit** for anyone.

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

📜 **Public Exp?**: **No PoC provided** in data. <br>🕵️ **Status**: References link to NinjaForms & Wordfence. <br>⚠️ **Risk**: High CVSS suggests **wild exploitation likely** soon due to low barrier.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: <br>1. Check WP Plugin list for **Ninja Forms**. <br>2. Verify version is **< 3.3.26**. <br>3. Scan for **unrestricted upload endpoints** in `/wp-admin/admin-ajax.php`. <br>4.…

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Q8Is it fixed officially? (Patch/Mitigation)

🛠️ **Fix**: Update to **version 3.3.27+** (implied). <br>📥 **Source**: Official NinjaForms extension page. <br>✅ **Action**: Patch immediately to close the validation gap.

Q9What if no patch? (Workaround)

🚧 **No Patch?**: <br>1. **Disable** the File Uploads extension. <br>2. **Restrict** upload permissions via `.htaccess`/Nginx. <br>3. Use **WAF** to block malicious file uploads. <br>4.…

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Q10Is it urgent? (Priority Suggestion)

🔴 **Priority**: **CRITICAL (P1)**. <br>⏱️ **Urgency**: **Immediate**. <br>📉 **CVSS**: **9.8** (Critical). <br>🚀 **Action**: Patch NOW. No auth needed makes this an instant target for bots.

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