CVE-2019-9082: ThinkPHP Remote Code Execution Vulnerability
What It Is — ThinkPHP 5.x contains an undocumented flaw that lets an attacker invoke arbitrary system commands through a crafted URL (e.g., public//?s=index/\think\app/invokefunction&function=call_user_func_array&vars[0]=system&vars[1][]=). The vulnerability results in remote code execution (RCE) on any server running the vulnerable framework version.
Exploitability — Publicly‑available proof‑of‑concept exploits exist; the vulnerability is exploitable over the network without authentication. CVSS v3.1 base score is 9.8 (Critical).
Affected Products — ThinkPHP framework (all versions prior to the vendor’s 5.0.23 patch).
Why It Matters for Trust & Control Assurance
- Demonstrates the need for a vulnerability‑management control that continuously inventories, assesses, and patches application components.
- A successful RCE bypasses any downstream access controls, eroding the audit trail that enterprises rely on for compliance evidence.
- Continuous control mapping (e.g., linking remediation tickets to framework objectives) provides the defensible proof points buyers demand during security reviews.
Recommended Actions
- Verify your inventory for any ThinkPHP deployments and confirm version numbers.
- Apply the vendor‑released patch (≥ 5.0.23) or upgrade to a later, supported release.
- If immediate patching is not possible, implement a web‑application firewall rule that blocks the malicious request pattern.
- Record the remediation steps in your vulnerability‑management system and map the activity to the “Application Vulnerability Management” control objective (aligned with NIST CSF 2.0 Identify → Risk Assessment).
Source: CISA KEV – CVE‑2019‑9082