CVE-2025-71177 is a stored cross-site scripting (XSS) vulnerability classified under CWE-79, found in LavaLite CMS up to version 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 these results. The vulnerability leverages the trust between the user and the web application, enabling attackers to perform actions such as session hijacking, stealing credentials, or executing unauthorized commands within the victim's session context. Exploitation requires the attacker to have authenticated access to the CMS to inject the payload and requires victims to interact with the search results page. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required beyond authentication, and user interaction is necessary. The impact on confidentiality and integrity is low to limited, but the vulnerability can facilitate further attacks if combined with other weaknesses. No patches or known exploits are currently documented, but the vulnerability is publicly disclosed and should be addressed promptly.

For European organizations using LavaLite CMS, this vulnerability poses a moderate risk primarily in multi-user environments where authenticated users have the ability to create or modify packages. Exploitation could lead to session hijacking or credential theft, potentially allowing attackers to escalate privileges or move laterally within the network. This can compromise sensitive data and disrupt business operations. Since the vulnerability requires authenticated access, insider threats or compromised accounts are the most likely vectors. The stored nature of the XSS means that malicious scripts persist and can affect multiple users over time, increasing the risk of widespread impact. Organizations in sectors with high regulatory requirements for data protection, such as finance, healthcare, and government, could face compliance issues if such attacks lead to data breaches. Additionally, the vulnerability could be used as a foothold for further attacks, including deploying malware or ransomware. The medium severity rating suggests that while the immediate impact is moderate, the potential for escalation warrants timely remediation.

1. Apply patches or updates from LavaLite CMS as soon as they become available to address this vulnerability directly. 2. Implement strict input validation and output encoding on all user-supplied data fields, especially those rendered in search results, to prevent injection of malicious scripts. 3. Restrict package creation and editing permissions to trusted users only, minimizing the risk of malicious payload injection. 4. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers. 5. Conduct regular security audits and code reviews focusing on input handling and output encoding. 6. Educate users about the risks of clicking on suspicious links or interacting with untrusted content within the CMS. 7. Monitor logs for unusual activity related to package creation or search queries that may indicate exploitation attempts. 8. Consider implementing multi-factor authentication (MFA) to reduce the risk of account compromise that could lead to exploitation. 9. Use web application firewalls (WAF) with rules designed to detect and block XSS payloads targeting the CMS. 10. Isolate the CMS environment where possible to limit lateral movement if an account is compromised.