CVE-2025-7063 is a critical security vulnerability classified under CWE-434 (Unrestricted Upload of File with Dangerous Type) affecting the Polska Akademia Dostępności (PAD) CMS. The root cause is a client-controlled permission check parameter in the file upload functionality, which fails to properly restrict file types and extensions. This flaw allows unauthenticated remote attackers to upload arbitrary files, including potentially malicious scripts or executables. Once uploaded, these files can be executed on the server, resulting in remote code execution (RCE). The vulnerability impacts all three templates of PAD CMS: www, bip, and ww+bip. The product is end-of-life, and the vendor will not release patches or fixes, increasing the risk for users. The CVSS 4.0 score is 10.0, reflecting a network attack vector with no required privileges or user interaction, and a high impact on confidentiality, integrity, and availability. The vulnerability’s exploitation could lead to full system compromise, data breaches, service disruption, and lateral movement within affected networks. No known exploits have been reported in the wild yet, but the critical nature and ease of exploitation make it a high priority for remediation or mitigation. The vulnerability was reserved in July 2025 and published in September 2025 by CERT-PL, indicating a recent discovery and disclosure.

For European organizations, the impact of CVE-2025-7063 is severe. Successful exploitation can lead to full remote code execution on servers running PAD CMS, allowing attackers to execute arbitrary commands, install malware, exfiltrate sensitive data, or disrupt services. This can compromise the confidentiality, integrity, and availability of affected systems and networks. Given that PAD CMS is used primarily in Poland and possibly other European countries for public sector and institutional websites, exploitation could affect government services, educational institutions, and accessibility-focused organizations. The end-of-life status of PAD CMS means no official patches will be provided, increasing the risk of prolonged exposure. Attackers could leverage this vulnerability to establish persistent access, pivot to other internal systems, or launch further attacks such as ransomware. The critical severity and network accessibility make this a significant threat to European organizations relying on PAD CMS for their web presence and content management.

Since no patches are available due to the product’s end-of-life status, European organizations should implement the following specific mitigations: 1) Immediately disable or restrict the file upload functionality in PAD CMS to prevent unauthorized uploads. 2) Isolate PAD CMS servers from critical internal networks using network segmentation and firewalls to limit potential lateral movement. 3) Employ web application firewalls (WAFs) with custom rules to detect and block suspicious file uploads or execution attempts. 4) Monitor server logs and network traffic for unusual activity indicative of exploitation attempts. 5) Consider migrating to a supported and actively maintained CMS platform that offers robust security controls. 6) Harden server configurations by disabling unnecessary services and enforcing strict file execution permissions. 7) Conduct regular security assessments and penetration testing focused on web application vulnerabilities. 8) Educate administrators about the risks and signs of exploitation to enable rapid incident response. These measures go beyond generic advice by focusing on compensating controls and proactive detection in the absence of vendor patches.