CVE-2025-69770 is a critical security vulnerability categorized as a zip slip flaw in the MojoPortal CMS version 2.9.0.1, specifically in the /DesignTools/SkinList.aspx endpoint. Zip slip vulnerabilities occur when an application extracts files from a zip archive without properly sanitizing file paths, allowing attackers to craft zip files that overwrite arbitrary files on the server filesystem. In this case, the vulnerability enables attackers to upload a malicious zip archive that, when processed by the vulnerable endpoint, can lead to arbitrary command execution. This means an attacker can run commands on the server with the privileges of the web application, potentially leading to full system compromise, data theft, or further network penetration. The vulnerability does not require prior authentication or user interaction beyond the upload, increasing its risk. Although no patches or exploit code are currently publicly available, the vulnerability's nature and potential impact make it a high-risk issue. MojoPortal CMS is an open-source web content management system used by various organizations worldwide, including European entities. The lack of a CVSS score means severity must be assessed based on impact and exploitability factors. Given the ability to execute arbitrary commands remotely and without authentication, the severity is high. Organizations using MojoPortal CMS should urgently assess their exposure and implement mitigations or updates once available.

For European organizations, this vulnerability poses a significant threat to the confidentiality, integrity, and availability of web servers running MojoPortal CMS v2.9.0.1. Successful exploitation could allow attackers to execute arbitrary commands, potentially leading to full server compromise, data breaches, defacement, or use of the server as a pivot point for lateral movement within the network. This could disrupt business operations, damage reputation, and result in regulatory penalties under GDPR if personal data is exposed. Organizations relying on MojoPortal for public-facing websites or internal portals are particularly at risk. The ease of exploitation without authentication increases the likelihood of attacks, especially from opportunistic threat actors scanning for vulnerable instances. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate it, as proof-of-concept or weaponized exploits may emerge. European sectors such as government, education, and SMEs using MojoPortal CMS are vulnerable and should prioritize mitigation.

1. Immediately audit all instances of MojoPortal CMS in your environment to identify version 2.9.0.1 deployments. 2. Restrict file upload permissions on the /DesignTools/SkinList.aspx endpoint to trusted users only, or disable the upload feature if not required. 3. Implement strict server-side validation and sanitization of uploaded zip files to prevent directory traversal and path injection attacks. 4. Employ web application firewalls (WAFs) with rules designed to detect and block zip slip attack patterns and suspicious file uploads. 5. Monitor server logs and file system changes for unusual activity related to zip file extraction or command execution attempts. 6. Isolate affected web servers in segmented network zones to limit lateral movement if compromised. 7. Stay alert for official patches or security advisories from MojoPortal developers and apply updates promptly once available. 8. Conduct penetration testing focused on file upload and extraction functionalities to verify mitigation effectiveness. 9. Educate administrators and developers about secure file handling practices to prevent similar vulnerabilities.