CRLF injection vulnerability in OXID eShop Professional Edition before 4.7.11 and 4.8.x before 4.8.4, Enterprise Edition before 5.0.11 and 5.1.x before 5.1.4, and Community Edition before 4.7.11 and 4.8.x before 4.8.4 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via unspecified vectors.