CVE-2025-7713 is a vulnerability classified under CWE-79, indicating improper neutralization of input during web page generation, leading to Cross-site Scripting (XSS). This specific flaw exists in the Global Interactive Design Media Software Inc. Content Management System (CMS), where malicious input can be injected through HTTP headers. The vulnerability allows attackers to execute arbitrary scripts in the context of the victim's browser without requiring authentication or user interaction, as indicated by the CVSS vector (AV:N/AC:L/PR:N/UI:N). The impact primarily affects availability (A:H) and confidentiality (C:L), suggesting that while data leakage is limited, the system's availability can be significantly disrupted, potentially through script-based denial-of-service or session disruption attacks. The vulnerability affects all versions up to 21072025, with no patches currently available. The lack of known exploits in the wild suggests it is either newly discovered or under limited active exploitation. The vulnerability arises because the CMS fails to properly sanitize or encode HTTP header inputs before incorporating them into web pages, allowing malicious scripts to be executed in users' browsers. This can lead to session hijacking, defacement, or denial-of-service conditions. Given the CMS's role in managing web content, exploitation could impact a wide range of web-facing services and applications.

For European organizations, this vulnerability poses a significant risk to web-facing applications managed via the affected CMS. The high CVSS score and network exploitability mean attackers can remotely execute scripts without authentication, potentially disrupting service availability and causing denial-of-service conditions. Confidentiality impact is limited but still present, as attackers might steal session tokens or perform phishing via script injection. Organizations relying on this CMS for critical public-facing websites or internal portals could face service outages or reputational damage. The lack of patches increases exposure time, making proactive mitigation essential. Additionally, regulatory compliance under GDPR mandates protection of user data and service availability, so exploitation could lead to legal and financial consequences. Attackers could leverage this vulnerability to target government portals, financial institutions, or healthcare providers using this CMS, amplifying the impact. The vulnerability's exploitation could also facilitate further attacks by establishing footholds or pivoting within networks.

1. Implement strict input validation and sanitization on all HTTP headers before processing or rendering them in web pages. 2. Employ output encoding techniques, such as HTML entity encoding, to neutralize potentially malicious scripts in headers. 3. Deploy Web Application Firewalls (WAFs) configured to detect and block XSS payloads, especially those injected via HTTP headers. 4. Monitor web server and application logs for unusual or suspicious HTTP header values indicative of attack attempts. 5. Isolate the CMS environment and restrict access to minimize potential lateral movement if exploitation occurs. 6. Engage with the vendor for timely patch releases and apply updates as soon as they become available. 7. Conduct regular security assessments and penetration testing focusing on header injection vectors. 8. Educate developers and administrators on secure coding practices related to input handling and output encoding. 9. Consider implementing Content Security Policy (CSP) headers to reduce the impact of XSS attacks by restricting script execution sources. 10. For immediate risk reduction, disable or limit features that reflect HTTP header values in web pages if feasible.