CVE-2025-71177 is a stored cross-site scripting (XSS) vulnerability classified under CWE-79 affecting LavaLite CMS versions up to and including 10.1.0. The flaw exists in the package creation and search functionality, where authenticated users can input crafted HTML or JavaScript code into the package Name or Description fields. This input is stored persistently and later rendered in search results without proper output encoding or sanitization, allowing the malicious script to execute in the browsers of users who view the search results. This type of XSS can enable attackers to hijack user sessions, steal credentials, or perform unauthorized actions within the victim's context. The vulnerability requires the attacker to have authenticated access to the CMS and relies on victims interacting with the search results containing the malicious payload. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required beyond authenticated user, user interaction required, and low impact on confidentiality and integrity but limited availability impact. No public exploits have been reported yet, but the vulnerability is published and should be addressed promptly. The lack of proper output encoding in web page generation is a common security oversight that can lead to significant risks if exploited in environments with multiple users and sensitive data.

For European organizations using LavaLite CMS, this vulnerability poses a risk of session hijacking, credential theft, and unauthorized actions performed under the guise of legitimate users. This can lead to data breaches, unauthorized changes to web content or configurations, and potential lateral movement within the organization's network. The impact is particularly significant for organizations relying on LavaLite CMS for public-facing websites or internal portals with multiple authenticated users. Exploitation could undermine user trust, lead to regulatory compliance issues under GDPR due to unauthorized data access, and cause reputational damage. Since the vulnerability requires authenticated access, insider threats or compromised accounts increase the risk. The medium severity rating suggests moderate risk, but the potential for chained attacks or further exploitation elevates the importance of timely mitigation.

1. Upgrade LavaLite CMS to a version that addresses this vulnerability once available. 2. In the absence of a patch, implement strict input validation and output encoding on the package Name and Description fields to neutralize HTML and JavaScript content before storage and rendering. 3. Restrict package creation and editing permissions to trusted users only, minimizing the risk of malicious input. 4. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers. 5. Conduct regular security audits and penetration testing focusing on input handling and XSS vulnerabilities. 6. Educate users to be cautious when interacting with search results and report suspicious behavior. 7. Monitor logs for unusual activity related to package creation or search queries. 8. Implement multi-factor authentication to reduce the risk of account compromise that could lead to exploitation.