CVE-2024-43989 in Firsh Justified Image Grid Plugin
Summary
by MITRE • 09/23/2024
Server-Side Request Forgery (SSRF) vulnerability in Firsh Justified Image Grid justified-image-grid.This issue affects Justified Image Grid: from n/a through <= 4.6.1.
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Analysis
by VulDB Data Team • 04/02/2026
The Server-Side Request Forgery vulnerability identified as CVE-2024-43989 represents a critical security flaw within the Firsh Justified Image Grid WordPress plugin. This vulnerability specifically impacts versions ranging from the initial release through version 4.6.1, creating a significant attack surface for malicious actors targeting WordPress installations. The vulnerability stems from inadequate input validation and sanitization within the plugin's server-side processing mechanisms, allowing unauthorized parties to manipulate requests that are subsequently forwarded to internal systems.
The technical implementation of this SSRF flaw occurs when the plugin processes user-supplied data without proper validation, enabling attackers to inject malicious URLs or IP addresses that the server will attempt to access on behalf of the vulnerable application. This creates a dangerous scenario where an attacker can potentially access internal network resources, bypass firewalls, or perform reconnaissance activities against systems that should remain isolated from external access. The vulnerability manifests in the plugin's handling of image grid configurations and external resource references, where user input directly influences server-side request behavior. This type of vulnerability is classified under CWE-918 as Server-Side Request Forgery, which is a well-documented attack pattern that allows attackers to manipulate the target server into making unintended requests to internal or external systems.
The operational impact of this vulnerability extends beyond simple data exposure, as it provides attackers with potential access to sensitive internal infrastructure components. Attackers can leverage this flaw to probe internal network services, access administrative interfaces, or even escalate privileges within the compromised WordPress environment. The attack vector typically involves crafting malicious requests that exploit the plugin's image processing functionality, where the server's response to these requests can reveal internal system information or allow unauthorized access to backend services. This vulnerability aligns with ATT&CK technique T1071.004 for Application Layer Protocol: DNS, as attackers may use the SSRF capability to perform DNS tunneling or other network reconnaissance activities. The risk is particularly elevated in environments where WordPress installations are hosted in shared or complex network infrastructures where internal systems are not adequately protected from external access.
Mitigation strategies for this vulnerability should begin with immediate patching of the affected plugin to version 4.6.2 or later, which contains the necessary security fixes to prevent unauthorized server-side requests. Organizations should implement network-level restrictions using firewalls to prevent outbound connections from the web server to internal systems, particularly those that are not essential for the plugin's functionality. Additionally, input validation mechanisms should be strengthened to ensure that all user-supplied URLs are properly sanitized and validated before processing. Security monitoring should be enhanced to detect unusual outbound network requests that may indicate exploitation attempts. The implementation of web application firewalls and security headers can provide additional layers of protection against such attacks. Regular security audits of WordPress plugins and themes should be conducted to identify similar vulnerabilities, and automated patch management systems should be deployed to ensure timely updates. Organizations should also consider implementing network segmentation strategies that isolate web applications from critical internal systems to limit the potential impact of successful exploitation attempts.