CVE-2025-52751 is a reflected Cross-site Scripting (XSS) vulnerability identified in the colome Slide Puzzle web application, affecting versions up to and including 1.0.0. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, which allows attackers to inject malicious JavaScript code that is reflected back to the user without proper sanitization. When a victim interacts with a crafted URL containing malicious payloads, the injected script executes in their browser context, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the user. The CVSS v3.1 base score is 7.1, indicating a high severity level, with an attack vector of network (remote), low attack complexity, no privileges required, but user interaction necessary. The scope is changed, meaning the vulnerability can affect resources beyond the vulnerable component. The confidentiality, integrity, and availability impacts are all rated low but present, as the attack can leak sensitive information, modify client-side data, or disrupt user sessions. Although no known exploits are currently reported in the wild, the vulnerability's nature makes it a likely target for phishing or social engineering campaigns. No official patches or updates have been released yet, increasing the urgency for defensive measures. The vulnerability was reserved in June 2025 and published in October 2025, indicating recent discovery and disclosure.

For European organizations, the reflected XSS vulnerability in colome Slide Puzzle poses risks primarily to users interacting with the affected web application. Potential impacts include theft of session cookies, enabling attackers to impersonate users and access sensitive information or perform unauthorized actions. This can lead to data breaches, loss of user trust, and potential regulatory non-compliance under GDPR if personal data is compromised. Additionally, attackers could use the vulnerability to deliver malware or conduct phishing attacks targeting employees or customers. The availability impact is limited but possible if attackers disrupt user sessions or cause browser crashes. Organizations relying on colome Slide Puzzle for internal or customer-facing services may face operational disruptions and reputational damage. The lack of patches increases exposure time, necessitating proactive mitigations. The impact is more pronounced in sectors with high security requirements, such as finance, healthcare, and government entities within Europe.

1. Implement strict input validation and output encoding on all user-supplied data before rendering it in web pages, using context-aware encoding to prevent script injection. 2. Deploy Web Application Firewalls (WAFs) with custom rules to detect and block malicious payloads targeting the vulnerable parameters of the Slide Puzzle application. 3. Educate users and employees about the risks of clicking on suspicious links, especially those purporting to be related to the Slide Puzzle application. 4. Monitor web server logs for unusual URL parameters or repeated attempts to exploit reflected XSS vectors. 5. If possible, isolate or restrict access to the Slide Puzzle application to trusted networks or users until an official patch is released. 6. Engage with the vendor or community to obtain updates or patches as soon as they become available. 7. Consider implementing Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers accessing the application. 8. Conduct regular security assessments and penetration testing focused on web application vulnerabilities to detect similar issues early.