CVE-2022-4097 in All-In-One Security Plugin
Summary
by MITRE • 12/12/2022
The All-In-One Security (AIOS) WordPress plugin before 5.0.8 is susceptible to IP Spoofing attacks, which can lead to bypassed security features (like IP blocks, rate limiting, brute force protection, and more).
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Analysis
by VulDB Data Team • 04/14/2025
The All-In-One Security WordPress plugin vulnerability CVE-2022-4097 represents a critical security flaw that undermines fundamental network security controls through IP spoofing techniques. This vulnerability affects versions prior to 5.0.8 and allows attackers to manipulate the plugin's IP-based security mechanisms, potentially compromising the integrity of access controls and authentication protections. The flaw specifically targets the plugin's handling of client IP addresses during security operations, creating a pathway for malicious actors to circumvent defensive measures that rely on IP address validation. Such a vulnerability directly contradicts standard security practices where IP-based restrictions should provide reliable protection against unauthorized access attempts and automated attack vectors. The issue stems from improper validation of HTTP headers that contain client IP information, particularly when the plugin relies on forwarded-for headers or proxy configurations without adequate verification of their authenticity.
The technical implementation of this vulnerability manifests when the AIOS plugin processes incoming requests and determines client IP addresses through HTTP headers rather than direct socket connections. This approach is common in environments where WordPress instances operate behind load balancers, reverse proxies, or CDN services, but it introduces a significant risk when proper header validation is not implemented. Attackers can exploit this weakness by crafting malicious HTTP requests with spoofed IP addresses in headers such as X-Forwarded-For or X-Real-IP, causing the plugin to incorrectly identify their true location. The vulnerability enables bypass of multiple security features including IP-based blacklists, rate limiting mechanisms, and brute force protection systems that depend on accurate IP address detection. This creates a cascading effect where attackers can repeatedly attempt unauthorized access without triggering the intended rate limiting controls or get past IP blocks that should have prevented their access. The flaw aligns with CWE-284 access control vulnerabilities and represents a specific case of improper input validation in network security contexts.
The operational impact of CVE-2022-4097 extends beyond simple access control bypasses to potentially enable more sophisticated attack vectors within compromised WordPress environments. Security administrators who rely on IP-based protections for their WordPress installations may find these controls rendered ineffective, leading to increased vulnerability to brute force attacks, automated scanning, and unauthorized access attempts. The vulnerability particularly affects sites with high security requirements where IP-based restrictions are critical components of the defense-in-depth strategy. Organizations using the AIOS plugin for comprehensive security management may experience false security assurances while their systems remain vulnerable to attacks that exploit this IP spoofing weakness. The risk is compounded in environments where multiple security layers depend on accurate IP information, as the vulnerability creates a single point of failure that undermines the effectiveness of the entire security stack. This type of vulnerability can also facilitate reconnaissance activities where attackers use IP spoofing to test various attack vectors without triggering the expected security responses, making detection more difficult.
Mitigation strategies for CVE-2022-4097 require immediate attention through plugin updates to version 5.0.8 or later, which contains the necessary fixes for proper IP address validation. Organizations should also implement additional network-level controls such as firewall rules that validate the authenticity of forwarded headers and restrict which IP addresses can send spoofed headers. The implementation of proper header validation techniques including source IP address verification and header sanitization can help prevent exploitation of this vulnerability. Security teams should conduct comprehensive audits of their WordPress security configurations to ensure that no other plugins or components rely on unvalidated IP address information. Network administrators should consider implementing more robust authentication mechanisms that do not solely depend on IP-based restrictions, such as multi-factor authentication or more sophisticated access control systems. This vulnerability demonstrates the importance of validating all user-supplied information, particularly in security-sensitive contexts, and aligns with ATT&CK techniques related to privilege escalation and initial access through credential compromise. Regular security assessments and penetration testing should include verification of IP address handling mechanisms to prevent similar vulnerabilities from being introduced through other components or custom implementations.