This vulnerability in BiEticaret CMS allows attackers to bypass authentication mechanisms due to missing authentication checks on critical functions combined with an Execution After Redirect (EAR) flaw. This can result in HTTP response splitting attacks, potentially enabling attackers to manipulate HTTP headers and responses. The affected versions include 2.1.13 through 19022026. The CVSS 3.1 score of 9.8 reflects that the vulnerability is remotely exploitable without privileges or user interaction and has a high impact on confidentiality, integrity, and availability. No vendor response or patch has been provided to date.

Successful exploitation can lead to full authentication bypass, allowing unauthorized access to protected functions. HTTP response splitting may enable attackers to inject malicious content or manipulate web responses, potentially leading to further attacks such as cross-site scripting or cache poisoning. The high CVSS score indicates critical impact on system confidentiality, integrity, and availability.

No official patch or remediation is currently available, and the vendor has not responded to disclosure attempts. Organizations using affected versions should consider implementing compensating controls such as restricting access to the CMS, monitoring for suspicious activity, or isolating the affected system until a fix is provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance if it becomes available.