CVE-2025-52739 is a reflected Cross-site Scripting (XSS) vulnerability classified under CWE-79 affecting the uxper Sala web application up to version 1.1.3. This vulnerability occurs due to improper neutralization of input during web page generation, allowing attackers to inject malicious JavaScript code into web pages that are then reflected back to users. When a victim interacts with a crafted URL or input, the malicious script executes in their browser context, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the user. The vulnerability does not require any privileges (AV:N) and has low attack complexity (AC:L), but does require user interaction (UI:R), such as clicking a malicious link. The scope is changed (S:C), meaning the vulnerability can affect resources beyond the vulnerable component, impacting confidentiality, integrity, and availability to a limited extent (C:L/I:L/A:L). No patches or known exploits are currently available, but the high CVSS score of 7.1 indicates significant risk. The vulnerability is particularly concerning for organizations relying on the Sala product for web-based services, as exploitation could compromise user data and trust. The lack of a patch necessitates immediate mitigation through defensive coding practices and security controls.

For European organizations, this vulnerability poses a risk to user data confidentiality and integrity, as attackers can steal session cookies or manipulate web content. The reflected XSS can also lead to phishing attacks or malware distribution, undermining user trust and potentially causing reputational damage. Availability impact is limited but possible if attackers deface web pages or cause client-side disruptions. Organizations in sectors such as finance, healthcare, and government that use Sala for customer-facing or internal applications are particularly vulnerable. The risk is amplified in countries with high digital adoption and regulatory requirements for data protection, where exploitation could lead to compliance violations and financial penalties. Additionally, the vulnerability could be leveraged in targeted attacks against European entities due to geopolitical tensions or cybercrime activity focusing on this region.

1. Implement strict input validation and sanitization on all user-supplied data before rendering it in web pages to prevent injection of malicious scripts. 2. Apply proper output encoding (e.g., HTML entity encoding) to neutralize any potentially dangerous characters in reflected inputs. 3. Deploy a robust Content Security Policy (CSP) to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 4. Educate users to recognize and avoid clicking suspicious links or interacting with untrusted sources. 5. Monitor web application logs for unusual input patterns or repeated attempts to exploit reflected XSS. 6. Engage with the vendor (uxper) to obtain patches or updates as soon as they become available and prioritize their deployment. 7. Use web application firewalls (WAFs) with rules designed to detect and block reflected XSS payloads as an interim protective measure. 8. Conduct regular security assessments and penetration testing focused on input handling and client-side vulnerabilities.