CVE-2025-59719 — AI Deep Analysis Summary

Q: Who is affected? (Versions/Components)

🏢 **Vendor**: **Fortinet**. 📦 **Product**: **FortiWeb** (Web Application Firewall). 📅 **Affected Versions**: • v8.0.0 • v7.6.0 – v7.6.4 • v7.4.0 – v7.4.9

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

📉 **Threshold**: **LOW**. 🔑 **Auth**: **None Required** (PR:N). 🌐 **Network**: **Network** accessible (AV:N). 🖱️ **UI**: **No User Interaction** needed (UI:N). ⚡ **Complexity**: **Low** (AC:L).

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

🚫 **Public Exploit**: **No**. 📄 **PoCs**: Empty list in data. 🌍 **Wild Exploitation**: Not reported. 🔒 **Status**: Theoretical/Unconfirmed active exploitation.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. 📊 **CVSS**: **9.1** (High). ⏳ **Priority**: **P0**. 💡 **Advice**: Patch immediately. This allows unauthenticated attackers to bypass security controls entirely. Do not delay.

Updated May 06, 2026 CVSS 9.1 · Critical

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Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: FortiWeb has a **Data Forgery** flaw. <br>🛡️ **Consequence**: Attackers can bypass **FortiCloud SSO** authentication. <br>💥 **Impact**: Full compromise of Web App Firewall security.…

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Q2Root Cause? (CWE/Flaw)

🔍 **Root Cause**: **Improper Cryptographic Signature Verification**. <br>📌 **CWE**: **CWE-347** (Improper Verification of Cryptographic Signature).…

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Q3Who is affected? (Versions/Components)

🏢 **Vendor**: **Fortinet**. <br>📦 **Product**: **FortiWeb** (Web Application Firewall). <br>📅 **Affected Versions**: <br>• v8.0.0 <br>• v7.6.0 – v7.6.4 <br>• v7.4.0 – v7.4.9

Q4What can hackers do? (Privileges/Data)

🕵️ **Hackers Can**: <br>1. **Bypass SSO**: Trick FortiCloud into thinking they are authenticated. <br>2. **Forge Data**: Manipulate inputs without detection. <br>3.…

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Q5Is exploitation threshold high? (Auth/Config)

📉 **Threshold**: **LOW**. <br>🔑 **Auth**: **None Required** (PR:N). <br>🌐 **Network**: **Network** accessible (AV:N). <br>🖱️ **UI**: **No User Interaction** needed (UI:N). <br>⚡ **Complexity**: **Low** (AC:L).

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

🚫 **Public Exploit**: **No**. <br>📄 **PoCs**: Empty list in data. <br>🌍 **Wild Exploitation**: Not reported. <br>🔒 **Status**: Theoretical/Unconfirmed active exploitation.

Q7How to self-check? (Features/Scanning)

🔎 **Self-Check**: <br>1. Verify **FortiWeb Version** against the affected list. <br>2. Check for **FortiCloud SSO** integration usage. <br>3. Scan for **Signature Verification** anomalies in logs. <br>4.…

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Q8Is it fixed officially? (Patch/Mitigation)

🛡️ **Official Fix**: **Yes**. <br>📝 **Reference**: Fortinet PSIRT **FG-IR-25-647**. <br>🔗 **Link**: [FortiGuard Advisory](https://fortiguard.fortinet.com/psirt/FG-IR-25-647).…

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Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: <br>1. **Isolate**: Restrict network access to FortiWeb management. <br>2. **Monitor**: Enhanced logging for SSO bypass attempts. <br>3.…

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Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. <br>📊 **CVSS**: **9.1** (High). <br>⏳ **Priority**: **P0**. <br>💡 **Advice**: Patch immediately. This allows unauthenticated attackers to bypass security controls entirely. Do not delay.

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Vulnerability detail Full AI analysis (login) Fortinet CWE-347