Description
Incorrect Content-Type header in one of the APIs (`text/html` instead of `application/json`) replies may potentially allow injection of HTML/JavaScript into reply.This issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-34934
1. Vulnerability Assessment and Severity Evaluation
The vulnerability described in EUVD-2025-34934 pertains to an incorrect Content-Type header in API responses, where text/html is used instead of application/json. This misconfiguration can lead to the injection of HTML/JavaScript into the response, potentially enabling Cross-Site Scripting (XSS) attacks. The severity of this vulnerability is rated with a Base Score of 10.0 according to CVSS 4.0, indicating a critical risk. The CVSS vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H underscores the high impact on confidentiality, integrity, and availability, as well as the ease of exploitation.
2. Potential Attack Vectors and Exploitation Methods
- Cross-Site Scripting (XSS): An attacker could inject malicious scripts into the API response, which would be executed in the context of the user's browser. This could lead to session hijacking, data theft, or other malicious activities.
- Content Spoofing: By manipulating the HTML content, an attacker could present false information to users, potentially leading to phishing attacks or other forms of social engineering.
- Data Exfiltration: Malicious scripts could be used to exfiltrate sensitive data from the user's session, such as cookies, tokens, or personal information.
3. Affected Systems and Software Versions
The vulnerability affects the following software versions:
- BLU-IC2: Versions through 1.19.5
- BLU-IC4: Versions through 1.19.5
These products are developed by Azure Access Technology.
4. Recommended Mitigation Strategies
- Correct Content-Type Header: Ensure that the API responses use the correct Content-Type header (
application/json) for JSON data. - Input Validation and Sanitization: Implement robust input validation and sanitization to prevent the injection of malicious scripts.
- Content Security Policy (CSP): Deploy a strong Content Security Policy to mitigate the risk of XSS attacks by restricting the sources from which scripts can be loaded.
- Regular Patching: Apply the latest security patches and updates provided by Azure Access Technology to mitigate this and other potential vulnerabilities.
- Security Audits: Conduct regular security audits and penetration testing to identify and remediate similar issues.
5. Impact on European Cybersecurity Landscape
The high severity of this vulnerability poses a significant risk to organizations using the affected software within the European Union. Given the potential for data breaches and unauthorized access, this vulnerability could lead to violations of the General Data Protection Regulation (GDPR), resulting in substantial fines and reputational damage. It underscores the importance of robust cybersecurity practices and the need for timely patch management and vulnerability disclosure processes.
6. Technical Details for Security Professionals
- Vulnerability Identification: The vulnerability can be identified by examining the Content-Type header in API responses. Tools such as Burp Suite or OWASP ZAP can be used to intercept and analyze HTTP responses.
- Exploitation Detection: Monitoring for unusual script execution or unexpected HTML content in API responses can help detect potential exploitation attempts. Security Information and Event Management (SIEM) systems can be configured to alert on such anomalies.
- Patch Deployment: Organizations should prioritize the deployment of patches provided by Azure Access Technology. Testing the patches in a staging environment before full deployment can help ensure compatibility and stability.
- User Education: Educating users about the risks of XSS and phishing attacks can enhance the overall security posture. Users should be cautious of unexpected content or prompts in web applications.
Conclusion
EUVD-2025-34934 represents a critical vulnerability that requires immediate attention from cybersecurity professionals. By ensuring correct Content-Type headers, implementing robust security measures, and maintaining vigilant monitoring, organizations can mitigate the risks associated with this vulnerability and protect their systems and data from potential attacks.