A critical vulnerability in Inrove Software BiEticaret CMS allows unauthenticated attackers to bypass security controls and manipulate HTTP responses, posing a severe risk of system compromise.

The application is susceptible to an Execution After Redirect (EAR) and missing authentication for critical functions, allowing an unauthenticated attacker to bypass authentication mechanisms and execute HTTP response splitting attacks.

The lack of authentication for critical functions combined with the potential for HTTP response splitting allows an attacker to gain unauthorized access to the administrative backend or perform session hijacking. With a CVSS score of 9.8, this vulnerability represents a critical risk that could lead to full system takeover, unauthorized data access, and significant reputational damage.

Immediate Action: Since the vendor has been unresponsive, restrict network access to the BiEticaret CMS administrative interface to trusted IP addresses only until a patch is verified.

Proactive Monitoring: Review web server access logs for anomalous HTTP headers or unusual redirect patterns that may indicate attempts to exploit response splitting.

Compensating Controls: Deploy a Web Application Firewall (WAF) with rules configured to block unauthorized access to administrative endpoints and detect common injection patterns associated with response splitting.

Public Exploit Available: Unknown

Given the vendor's failure to provide a patch, this vulnerability requires immediate attention. Security teams should implement strict network-level access controls and continuous monitoring to prevent unauthorized exploitation of this critical authentication flaw.