CVE-2025-54544 is a medium-severity stored Cross-Site Scripting (XSS) vulnerability affecting OpenSolution's QuickCMS version 6.8. The vulnerability arises from improper neutralization of input during web page generation, specifically via the aDirFilesDescriptions parameter in the files editor functionality. An attacker with administrative privileges can inject arbitrary HTML and JavaScript code into the website content. This malicious code is then stored on the server and executed in the context of any user visiting the affected page. Although the default admin user is restricted from adding JavaScript directly, the vulnerability allows bypassing this limitation through the aDirFilesDescriptions parameter. The vendor was notified early but did not disclose details or affected version ranges beyond confirming version 6.8 as vulnerable. Other versions may also be susceptible but have not been tested. The CVSS 4.0 base score is 5.3 (medium), reflecting that the attack vector is network-based, requires no privileges or authentication, but does require user interaction (visiting the page). The vulnerability does not impact confidentiality, integrity, or availability directly but can be leveraged for session hijacking, phishing, or delivering malicious payloads to users. No known exploits are currently in the wild, and no patches have been released yet. This vulnerability falls under CWE-79, a common web application security weakness related to improper input sanitization and output encoding.

For European organizations using QuickCMS version 6.8, this vulnerability poses a risk primarily to website visitors and administrators. An attacker exploiting this flaw could execute arbitrary scripts in users' browsers, potentially leading to session hijacking, credential theft, defacement, or distribution of malware. Since the vulnerability requires admin privileges to inject code, the initial compromise vector may involve social engineering or credential theft targeting administrators. The impact on confidentiality and integrity of user data is moderate, as attackers can manipulate client-side content and potentially steal sensitive information. Availability is not directly affected. Organizations in sectors with public-facing websites, such as government, education, and small to medium enterprises relying on QuickCMS, could face reputational damage and regulatory scrutiny under GDPR if user data is compromised. The lack of vendor response and patches increases the risk window. Additionally, the vulnerability could be leveraged in targeted attacks against European entities with QuickCMS deployments, especially where administrative controls are weak or credentials are reused.

1. Immediate mitigation should focus on restricting administrative access to QuickCMS to trusted personnel only, enforcing strong, unique passwords and multi-factor authentication to reduce the risk of admin account compromise. 2. Implement Web Application Firewall (WAF) rules to detect and block suspicious input patterns targeting the aDirFilesDescriptions parameter, especially scripts or HTML tags. 3. Conduct thorough input validation and output encoding on all user-supplied content within QuickCMS, particularly in the files editor functionality. If possible, sanitize or strip HTML/JavaScript content from the aDirFilesDescriptions parameter. 4. Monitor website content changes and audit admin activities to detect unauthorized injections. 5. Isolate or sandbox the affected CMS environment to limit potential damage if exploitation occurs. 6. Engage with the vendor for patch release timelines and consider upgrading to newer versions once available. 7. Educate administrators about phishing and credential theft risks to prevent initial access. 8. If feasible, replace QuickCMS with a more secure CMS platform until a patch is released. 9. Regularly scan the website for XSS vulnerabilities using automated tools and manual testing.