CVE-2025-52793 is a Cross-Site Request Forgery (CSRF) vulnerability identified in the Esselink.nu Settings product, affecting versions up to 2.94. This vulnerability allows an attacker to trick an authenticated user into submitting a forged request to the Esselink.nu Settings application without their consent. The vulnerability is compounded by the presence of reflected Cross-Site Scripting (XSS), which can be leveraged to execute malicious scripts in the context of the victim's browser session. The CVSS 3.1 base score of 7.1 indicates a high severity level, with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), but requiring user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. The impact metrics show low confidentiality (C:L), integrity (I:L), and availability (A:L) impacts, implying that while the attacker can cause some unauthorized actions and potentially minor data exposure or modification, the overall damage is limited but still significant. The vulnerability does not currently have known exploits in the wild, and no patches have been published yet. Esselink.nu Settings is a product used for managing settings, likely in web environments, and the CSRF combined with reflected XSS can allow attackers to perform unauthorized actions on behalf of users, potentially leading to session hijacking, unauthorized configuration changes, or other malicious activities within the application context.

For European organizations using Esselink.nu Settings, this vulnerability poses a risk of unauthorized actions being performed within their web management interfaces. Attackers could exploit this flaw to manipulate settings, potentially leading to misconfigurations, data leakage, or service disruptions. The reflected XSS component increases the risk by enabling script execution in the victim's browser, which could facilitate session hijacking or further phishing attacks. Organizations in sectors with high reliance on web-based configuration tools—such as telecommunications, managed service providers, and enterprises with web infrastructure management—may face operational disruptions or data integrity issues. Given the network-level attack vector and no requirement for privileges, attackers can remotely target users, increasing the threat surface. The requirement for user interaction means social engineering or phishing campaigns could be used to trigger the exploit. The impact on confidentiality, integrity, and availability, while rated low individually, collectively can degrade trust in the affected systems and lead to cascading security issues if exploited in combination with other vulnerabilities.

1. Implement strict anti-CSRF tokens in all state-changing requests within Esselink.nu Settings to ensure that requests originate from legitimate users. 2. Employ Content Security Policy (CSP) headers and input validation to mitigate reflected XSS vulnerabilities, reducing the risk of script injection. 3. Enforce SameSite cookie attributes (preferably 'Strict' or 'Lax') to limit cookie transmission in cross-site requests. 4. Educate users on phishing and social engineering risks to reduce the likelihood of user interaction exploitation. 5. Monitor web application logs for unusual or unauthorized requests that could indicate exploitation attempts. 6. Restrict access to Esselink.nu Settings interfaces via network segmentation or VPNs to limit exposure to trusted users only. 7. Stay alert for vendor patches or updates addressing this vulnerability and apply them promptly once available. 8. Consider implementing Web Application Firewalls (WAF) with custom rules to detect and block CSRF and reflected XSS attack patterns targeting Esselink.nu Settings.