CVE-2025-48827 — AI Deep Analysis Summary

Q: Who is affected? (Versions/Components)

📦 **Affected Versions**: • vBulletin **5.0.0 – 5.7.5** • vBulletin **6.0.0 – 6.0.3** ⚠️ **Critical Condition**: Must be running on **PHP 8.1 or later**.

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

🕵️ **Attacker Capabilities**: • **No Auth Required**: Completely unauthenticated. • **Privileges**: Invoke protected API methods remotely. • **Impact**: Potential RCE, data theft, and full server takeover.

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

📉 **Exploitation Threshold**: **LOW**. • **Auth**: None needed. • **Config**: Only requires PHP 8.1+. • **UI**: No user interaction required. 🔓 **CVSS**: Critical (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).

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

💣 **Public Exploits**: **YES**. • Multiple PoCs available on GitHub (e.g., `CVE-2025-48827.py`). • Nuclei templates exist for automated scanning. • Tools support multi-threading and webshell upload.

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

🩹 **Official Fix**: **YES**. • Update vBulletin to versions **>5.7.5** and **>6.0.3**. • Ensure the patch addresses the Reflection API bypass.

Q: What if no patch? (Workaround)

🚧 **No Patch Workaround**: • **Upgrade PHP**: Downgrade to PHP <8.1 (if supported). • **WAF**: Block access to specific API endpoints. • **Network**: Restrict API access via IP whitelisting.

Q: Is it urgent? (Priority Suggestion)

⚡ **Urgency**: **CRITICAL / IMMEDIATE**. • Easy to exploit (No auth). • High impact (RCE). • Public exploits exist. 🔥 **Action**: Patch immediately or apply strict network controls.

Updated May 06, 2026 CVSS 10.0 · 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**: Unauthenticated access to protected API controllers in vBulletin.…

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Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-424** (Improper Access Control). <br>🔍 **Flaw**: Triggered by **PHP 8.1+** internal changes.…

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Q3Who is affected? (Versions/Components)

📦 **Affected Versions**: <br>• vBulletin **5.0.0 – 5.7.5** <br>• vBulletin **6.0.0 – 6.0.3** <br>⚠️ **Critical Condition**: Must be running on **PHP 8.1 or later**.

Q4What can hackers do? (Privileges/Data)

🕵️ **Attacker Capabilities**: <br>• **No Auth Required**: Completely unauthenticated. <br>• **Privileges**: Invoke protected API methods remotely. <br>• **Impact**: Potential RCE, data theft, and full server takeover.

Q5Is exploitation threshold high? (Auth/Config)

📉 **Exploitation Threshold**: **LOW**. <br>• **Auth**: None needed. <br>• **Config**: Only requires PHP 8.1+. <br>• **UI**: No user interaction required. <br>🔓 **CVSS**: Critical (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).

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

💣 **Public Exploits**: **YES**. <br>• Multiple PoCs available on GitHub (e.g., `CVE-2025-48827.py`). <br>• Nuclei templates exist for automated scanning. <br>• Tools support multi-threading and webshell upload.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: <br>1. **Scan**: Use Nuclei templates (`http/cves/2025/CVE-2025-48827.yaml`). <br>2. **Verify**: Check vBulletin version & PHP version (must be ≥8.1). <br>3.…

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Q8Is it fixed officially? (Patch/Mitigation)

🩹 **Official Fix**: **YES**. <br>• Update vBulletin to versions **>5.7.5** and **>6.0.3**. <br>• Ensure the patch addresses the Reflection API bypass.

Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: <br>• **Upgrade PHP**: Downgrade to PHP <8.1 (if supported). <br>• **WAF**: Block access to specific API endpoints. <br>• **Network**: Restrict API access via IP whitelisting.

Q10Is it urgent? (Priority Suggestion)

⚡ **Urgency**: **CRITICAL / IMMEDIATE**. <br>• Easy to exploit (No auth). <br>• High impact (RCE). <br>• Public exploits exist. <br>🔥 **Action**: Patch immediately or apply strict network controls.

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Vulnerability detail Full AI analysis (login) vBulletin CWE-424