CVE-2025-57567 is a remote code execution (RCE) vulnerability found in the PluXml content management system (CMS), specifically within the theme editor component. The vulnerability resides in the minify.php file located in the default theme directory (/themes/defaut/css/minify.php). An authenticated administrator user can exploit this vulnerability by overwriting the minify.php file with arbitrary PHP code through the CMS admin panel. This overwriting capability allows the attacker to execute arbitrary system commands on the underlying server, effectively gaining full control over the affected system. The vulnerability requires administrative authentication, meaning that an attacker must first compromise or have legitimate admin credentials to exploit it. There are no known public exploits in the wild at the time of publication, and no CVSS score has been assigned yet. The affected versions are unspecified, but the vulnerability is tied to the default theme’s minify.php script, which is a critical component for CSS minification in the CMS. This vulnerability is particularly dangerous because it allows code injection and execution at the system level, potentially leading to data theft, service disruption, or further network compromise. The vulnerability was reserved in August 2025 and published in October 2025, indicating recent discovery. The lack of patch links suggests that fixes may not yet be publicly available, increasing the urgency for mitigation and monitoring.

For European organizations using PluXml CMS, this vulnerability poses a significant risk. If an attacker gains administrative credentials—through phishing, credential stuffing, or insider threats—they can leverage this vulnerability to execute arbitrary code on the web server. This can lead to full system compromise, including data exfiltration, defacement, ransomware deployment, or pivoting to internal networks. The impact on confidentiality, integrity, and availability is critical, as attackers can manipulate or destroy data, disrupt services, or use the compromised server as a foothold for further attacks. Organizations relying on PluXml for public-facing websites or internal portals are at risk of reputational damage and regulatory penalties under GDPR if personal data is compromised. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially given the ease of exploitation once admin access is obtained. The threat is heightened in environments where administrative access controls are weak or where default themes are used without customization or hardening.

1. Restrict administrative access to the PluXml CMS admin panel using strong, unique credentials and multi-factor authentication (MFA) to reduce the risk of credential compromise. 2. Monitor and audit administrative activities and file changes within the /themes/defaut/css/ directory, especially the minify.php file, to detect unauthorized modifications. 3. Implement file integrity monitoring (FIM) solutions to alert on changes to critical PHP files. 4. Limit the use of the default theme or replace it with a custom theme that does not include vulnerable scripts. 5. Apply network segmentation and web application firewalls (WAF) to restrict access to the admin panel from trusted IP addresses only. 6. Regularly back up website files and databases to enable recovery in case of compromise. 7. Stay informed about official PluXml security advisories and apply patches promptly once available. 8. Conduct regular security assessments and penetration testing focused on CMS components and administrative interfaces. 9. Educate administrators on phishing and credential security best practices to prevent account takeover. 10. Consider disabling or restricting the minify.php functionality if not essential to operations.