CVE-2015-0899 — AI Deep Analysis Summary

🚨 **Essence**: Apache Struts 1 has an input validation error in `MultiPageValidator`. 📉 **Consequences**: Attackers can bypass security access restrictions and perform unauthorized operations remotely.

🛡️ **Root Cause**: Input Validation Error. The flaw lies in how `MultiPageValidator` handles page parameters, failing to verify them correctly before processing.

🏢 **Affected**: Apache Struts 1. 📦 **Versions**: Specifically versions **1.1 through 1.3.10**. (Note: Struts 2 is mentioned as a product line, but this CVE targets Struts 1).

💀 **Impact**: Remote attackers can bypass security controls. They gain the ability to execute **unauthorized operations** without proper authentication or authorization checks.

⚡ **Threshold**: **Low**. It is a **Remote** vulnerability. Attackers can exploit it by modifying page parameters over the network, requiring no local access.

📢 **Public Exp?**: The data lists references (BID 74423, JVNDB), but the `pocs` array is **empty**. No specific public Proof-of-Concept (PoC) code is provided in this dataset.

🔍 **Self-Check**: Scan for **Apache Struts 1** applications. Check if the version is between **1.1 and 1.3.10**. Look for usage of the `MultiPageValidator` component in the codebase.

🩹 **Fix**: The references point to confirmation links (Oracle, OSdn, JVN). Generally, upgrading to a patched version of Struts 1 or migrating to Struts 2 is the official mitigation path.

🚧 **No Patch?**: Implement strict **Input Validation** on page parameters. Ensure that `MultiPageValidator` inputs are sanitized and verified against a whitelist of allowed values.

🔥 **Urgency**: **High**. Since it allows remote bypass of security restrictions, it poses a direct threat to application integrity. Immediate patching or mitigation is recommended.