The vulnerability identified as CVE-2025-10049 affects the Responsive Filterable Portfolio plugin for WordPress, developed by nik00726. This plugin, in all versions up to and including 1.0.24, fails to properly validate file types during uploads via the HdnMediaSelection_image field. This missing validation allows authenticated users with Administrator-level privileges to upload arbitrary files to the server hosting the WordPress site. Because the plugin does not restrict the file types, attackers can upload malicious files such as web shells or scripts, potentially enabling remote code execution (RCE). The vulnerability is classified under CWE-434, which concerns unrestricted file upload vulnerabilities. The CVSS v3.1 base score is 7.2, reflecting a high severity due to the network attack vector, low attack complexity, required high privileges, no user interaction, and impacts on confidentiality, integrity, and availability. Although exploitation requires administrator access, the ability to upload arbitrary files can lead to full system compromise. No official patches or updates have been released at the time of this report, and no known exploits have been observed in the wild. The vulnerability poses a significant risk to WordPress sites using this plugin, especially those with multiple administrators or weak access controls.

The primary impact of this vulnerability is the potential for remote code execution on affected WordPress servers, which can lead to complete compromise of the website and underlying server infrastructure. Attackers with administrator access can upload malicious payloads, enabling them to execute arbitrary commands, steal sensitive data, deface websites, or pivot to other internal systems. This threatens the confidentiality, integrity, and availability of the affected systems. Organizations relying on this plugin for portfolio display or content management face risks of data breaches, service disruption, and reputational damage. Since WordPress is widely used globally, and administrator accounts are often shared or insufficiently protected, the scope of impact can be broad. The absence of patches increases the window of exposure. Additionally, compromised sites can be used as launchpads for further attacks, including phishing or malware distribution, amplifying the threat beyond the initial target.

1. Immediately restrict administrator access to trusted personnel only and enforce strong authentication mechanisms such as multi-factor authentication (MFA). 2. Audit existing uploaded files on the server for suspicious or unauthorized content, especially in directories related to the plugin. 3. Disable or uninstall the Responsive Filterable Portfolio plugin until a security patch or update is available. 4. Implement web application firewall (WAF) rules to detect and block suspicious file upload attempts targeting the HdnMediaSelection_image field. 5. Monitor server logs and WordPress activity logs for unusual file upload activity or administrator actions. 6. Regularly back up website data and server configurations to enable recovery in case of compromise. 7. Follow up with the plugin vendor or WordPress security advisories for updates or patches addressing this vulnerability. 8. Consider deploying file integrity monitoring tools to detect unauthorized changes to web files. 9. Educate administrators about the risks of arbitrary file uploads and the importance of least privilege principles. These steps go beyond generic advice by focusing on access control, monitoring, and proactive plugin management specific to this vulnerability.