CVE-2024-13905 is a Server-Side Request Forgery (SSRF) vulnerability identified in the sainwp OneStore Sites plugin for WordPress, specifically in all versions up to and including 0.1.1. The vulnerability resides in the class-export.php file, which improperly handles user-supplied input to generate web requests. This flaw enables unauthenticated attackers to coerce the vulnerable web application into making HTTP requests to arbitrary destinations, including internal network services that are otherwise inaccessible externally. SSRF vulnerabilities like this can be leveraged to perform internal network reconnaissance, access sensitive internal resources, or manipulate internal services by sending crafted requests. The vulnerability does not require authentication or user interaction, increasing its exploitation potential. The CVSS v3.1 base score is 5.3, reflecting a medium severity level due to the lack of impact on integrity or availability, but with confidentiality impact from potential internal data exposure. No public exploits or patches are currently available, indicating that organizations must rely on mitigations or vendor updates once released. The plugin’s market penetration is limited to WordPress sites using sainwp’s OneStore Sites, but given WordPress’s widespread use, the potential attack surface is non-trivial. The vulnerability highlights the risk of SSRF in web applications that interact with internal services without proper input validation or request filtering.

The primary impact of CVE-2024-13905 is unauthorized internal network access and information disclosure. Attackers can exploit this SSRF vulnerability to probe internal services behind firewalls, potentially discovering sensitive endpoints, configuration data, or administrative interfaces not intended for public access. Although the vulnerability does not directly allow data modification or denial of service, the ability to query internal services can facilitate further attacks, such as lateral movement or exploitation of other internal vulnerabilities. Organizations hosting WordPress sites with the vulnerable plugin risk exposure of internal infrastructure details, which can aid attackers in crafting more sophisticated attacks. The lack of authentication requirement increases the risk of automated scanning and exploitation attempts. While no known exploits are currently in the wild, the medium severity rating suggests that attackers may develop exploits, especially targeting organizations with valuable internal services. The impact is more significant for organizations with sensitive internal networks accessible from the web server, such as enterprises, e-commerce platforms, and government agencies using this plugin.

To mitigate CVE-2024-13905, organizations should first check for and apply any vendor-provided patches or updates for the sainwp OneStore Sites plugin once available. In the absence of patches, administrators should consider disabling or uninstalling the plugin to eliminate the attack vector. Implementing strict input validation and sanitization on any user-supplied data that influences server-side requests is critical. Network-level mitigations include restricting outbound HTTP requests from the web server to only trusted destinations using firewall rules or egress filtering, thereby preventing SSRF exploitation from reaching internal services. Monitoring web server logs for unusual outbound request patterns originating from the plugin’s endpoints can help detect exploitation attempts. Employing Web Application Firewalls (WAFs) with custom rules to block suspicious request parameters targeting class-export.php may provide temporary protection. Additionally, isolating the web server in a segmented network zone with minimal access to internal services reduces potential impact. Regular security audits and vulnerability scanning of WordPress plugins should be part of ongoing security hygiene.