CVE-2025-59114 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the file upload functionality of Windu CMS version 4.1. CSRF vulnerabilities allow attackers to trick authenticated users into submitting unwanted actions to a web application without their consent. In this case, an attacker can create a specially crafted malicious website that, when visited by a user logged into a vulnerable Windu CMS instance, automatically triggers the upload of malicious files to the server. This can lead to unauthorized file uploads, potentially enabling remote code execution, website defacement, or further exploitation depending on the uploaded file's nature and server configuration. The vulnerability does not require the attacker to have any privileges or authentication, but it does require the victim to interact by visiting the malicious site. The CVSS 4.0 score of 5.1 reflects a medium severity, considering the network attack vector, low complexity, no privileges required, but user interaction is necessary. The vulnerability was confirmed in version 4.1 and fixed in build 2250 of that version. No known exploits have been reported in the wild as of the publication date. The vulnerability is categorized under CWE-352, which is the standard classification for CSRF issues. The lack of patch links suggests that users should obtain the fixed build directly from the vendor or official sources. This vulnerability highlights the importance of implementing anti-CSRF protections and validating file uploads securely in CMS platforms.

For European organizations using Windu CMS version 4.1, this vulnerability poses a risk of unauthorized file uploads that can lead to website defacement, data breaches, or server compromise. Attackers exploiting this flaw could upload malicious scripts or backdoors, potentially gaining persistent access or pivoting within the network. This could disrupt business operations, damage reputation, and lead to regulatory compliance issues under GDPR if personal data is exposed. The requirement for user interaction means phishing or social engineering campaigns could be used to lure authenticated users to malicious sites. Organizations with public-facing websites running vulnerable Windu CMS instances are particularly at risk. The impact is amplified in sectors where website integrity and availability are critical, such as government, finance, and healthcare. Although no active exploits are known, the medium severity and ease of exploitation warrant proactive mitigation to avoid potential future attacks.

1. Upgrade Windu CMS to version 4.1 build 2250 or later, where the vulnerability is fixed. 2. Implement anti-CSRF tokens on all forms, especially those handling file uploads, to ensure requests originate from legitimate users. 3. Restrict file upload permissions and validate uploaded file types and sizes rigorously to prevent malicious content. 4. Employ Content Security Policy (CSP) headers to limit the impact of malicious scripts. 5. Educate users about phishing and social engineering tactics to reduce the risk of visiting malicious sites. 6. Monitor web server logs for unusual file upload activity or requests originating from suspicious sources. 7. Use web application firewalls (WAFs) with rules to detect and block CSRF attack patterns. 8. Conduct regular security audits and penetration testing focusing on web application vulnerabilities. 9. Isolate CMS environments and limit administrative access to reduce the blast radius of a successful attack.