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How the CVE Works
CVE-2025-48827 exploits a vulnerability in vBulletin (versions 5.0.0–5.7.5 and 6.0.0–6.0.3) where unauthenticated users can bypass access controls on protected API methods when running on PHP 8.1+. The flaw occurs due to improper input validation in /api.php, allowing attackers to invoke restricted methods via crafted requests (e.g., /api.php?method=protectedMethod). This was actively exploited in May 2025, enabling unauthorized API access and potential remote code execution.
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Platform: vBulletin
Version: 5.0.0–6.0.3
Vulnerability: API Bypass
Severity: Critical
Date: 06/25/2025
Prediction: Patch by 07/15/2025
What Undercode Say
Analytics:
curl -X GET "http://target/api.php?method=protectedMethod" grep -r "protectedMethod" /var/www/vbulletin/core/
Exploit:
GET /api.php?method=adminDeleteUser HTTP/1.1 Host: vulnerable-site.com
Protection from this CVE:
- Disable `/api.php` if unused.
- Upgrade to patched versions.
- Implement WAF rules.
Impact:
- Unauthenticated RCE.
- Data manipulation.
- Admin privilege escalation.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
