CVE-2025-45893 in OpenCart
Summary
by MITRE • 07/25/2025
OpenCart version 4.1.0.4 is vulnerable to a Stored Cross-Site Scripting (XSS) attack via SVG file uploads used in blog posts. The vulnerability arises because SVG files uploaded through the media manager are not properly sanitized. Attackers can craft a malicious SVG file containing embedded JavaScript
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Analysis
by VulDB Data Team • 08/07/2025
The vulnerability identified as CVE-2025-45893 affects OpenCart version 4.1.0.4 and represents a critical stored cross-site scripting flaw that specifically targets the blog post functionality within the platform. This vulnerability stems from insufficient input validation and sanitization mechanisms when processing SVG file uploads through the media manager component. The issue creates a persistent security risk where malicious actors can embed malicious JavaScript code within SVG files that are then stored on the server and executed whenever the blog post containing the compromised media is viewed by end users. The flaw operates under CWE-79 which categorizes cross-site scripting vulnerabilities, and aligns with ATT&CK technique T1566.001 for initial access through malicious file uploads, making it particularly dangerous in web application environments where user-generated content is permitted.
The technical implementation of this vulnerability occurs when the OpenCart media manager processes SVG files without adequate sanitization of the XML content structure. SVG files are inherently rich in markup capabilities and support embedded JavaScript through various attributes and elements such as script tags, event handlers, and external resource references. When the system fails to properly validate or strip these potentially dangerous elements from uploaded SVG files, attackers can craft malicious files containing embedded JavaScript code that executes in the context of other users' browsers. The stored nature of this vulnerability means that the malicious payload persists on the server and affects all users who access the compromised blog posts, making it particularly effective for delivering persistent attacks against the application's user base.
The operational impact of CVE-2025-45893 extends beyond simple script execution and can enable sophisticated attack vectors including session hijacking, credential theft, and redirection to malicious domains. Attackers can leverage this vulnerability to steal cookies, session tokens, or other sensitive information from authenticated users who view compromised blog posts. The vulnerability also provides a potential entry point for more advanced attacks such as web shell deployment or lateral movement within the application environment. The stored nature of the XSS payload means that even if the initial upload is discovered and removed, the vulnerability remains exploitable as long as the malicious files persist in the system, creating ongoing security risks for organizations using the affected OpenCart version.
Organizations utilizing OpenCart 4.1.0.4 should immediately implement multiple layers of mitigation strategies to address this vulnerability. The primary remediation involves updating to a patched version of OpenCart that properly sanitizes SVG file uploads through the media manager component. Additionally, administrators should implement strict file validation policies that reject SVG files containing potentially dangerous elements or attributes. Network-level protections such as web application firewalls can provide additional defense-in-depth by monitoring for suspicious file upload patterns and blocking known malicious SVG constructs. Security teams should also conduct thorough audits of existing blog content to identify and remove any previously compromised SVG files, while implementing automated scanning solutions to monitor for similar vulnerabilities in other media upload components. The mitigation approach should follow ATT&CK framework guidance for defensive techniques including file integrity monitoring and application whitelisting to prevent unauthorized file modifications.