CVE-2023-38330 in eShop Enterprise Editio
Summary
by MITRE • 08/02/2023
OXID eShop Enterprise Edition 6.5.0 – 6.5.2 before 6.5.3 allows uploading files with modified headers in the administration area. An attacker can upload a file with a modified header to create a HTTP Response Splitting attack.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 01/19/2026
The vulnerability identified as CVE-2023-38330 affects OXID eShop Enterprise Edition versions 6.5.0 through 6.5.2, representing a critical security flaw that enables unauthorized file uploads with manipulated HTTP headers. This issue exists within the administration area of the e-commerce platform, where proper input validation and header sanitization mechanisms are insufficient to prevent malicious file uploads. The vulnerability stems from inadequate filtering of file headers during the upload process, allowing attackers to inject specially crafted headers that can manipulate HTTP responses. This flaw specifically impacts the platform's file handling capabilities within its administrative interface, creating a potential attack vector that could be exploited by malicious actors with access to the admin area.
The technical implementation of this vulnerability involves HTTP response splitting attacks that occur when an attacker uploads a file containing modified HTTP headers. The flaw allows for the injection of header data that can cause the web server to generate malformed HTTP responses, potentially enabling various malicious activities including session hijacking, cross-site scripting attacks, and cache poisoning. The vulnerability operates through the manipulation of standard HTTP header fields such as content-type, location, or other response headers that are typically controlled by the web application. When the system processes these modified headers, it fails to properly sanitize or validate the input, leading to the creation of HTTP responses that contain attacker-controlled data. This type of vulnerability is classified under CWE-113 as improper neutralization of CRLF characters in HTTP headers, which directly relates to the insecure handling of line terminators in HTTP response headers.
The operational impact of CVE-2023-38330 extends beyond simple file upload functionality, potentially enabling attackers to execute sophisticated attacks against the e-commerce platform and its users. An attacker who gains access to the administration area could leverage this vulnerability to manipulate HTTP responses, potentially redirecting users to malicious sites, injecting malicious content into responses, or disrupting normal application behavior. The vulnerability could facilitate session fixation attacks where attackers manipulate session cookies through modified headers, or enable cross-site scripting exploits by injecting malicious scripts into HTTP responses. Additionally, the ability to manipulate HTTP headers could be used to perform cache poisoning attacks against proxy servers or CDN services that process responses from the vulnerable application, creating broader impact across the entire web infrastructure. This vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under T1190 for Proxy Execution and T1566 for Phishing, as it enables the creation of malicious HTTP responses that can be used in social engineering campaigns.
Mitigation strategies for CVE-2023-38330 should focus on implementing comprehensive input validation and header sanitization mechanisms within the file upload process. Organizations should immediately upgrade to OXID eShop Enterprise Edition 6.5.3 or later, which contains the necessary patches to address the vulnerability. Additional defensive measures include implementing strict file type validation, sanitizing all HTTP headers during processing, and enforcing proper content security policies that prevent header injection attacks. The system should validate file headers against a whitelist of acceptable values and reject any uploads containing potentially malicious header modifications. Network-level protections such as web application firewalls can provide additional detection and prevention capabilities, while monitoring systems should be configured to detect unusual header patterns in HTTP responses. Security teams should also implement regular security audits of file upload mechanisms and conduct thorough penetration testing to identify similar vulnerabilities in related components. The remediation process should include comprehensive testing of the patched version to ensure that the vulnerability has been properly addressed without introducing regressions in functionality.