EUVD-2025-18128
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
Lifecycle Timeline
3Tags
Description
A Cross-Site Request Forgery (CSRF) vulnerability exists in the product image upload function of VirtueMart that bypasses the CSRF protection token. An attacker is able to craft a special CSRF request which will allow unrestricted file upload into the VirtueMart media manager.
Analysis
Cross-Site Request Forgery (CSRF) vulnerability in VirtueMart's product image upload function that allows attackers to bypass CSRF token protection and perform unrestricted file uploads to the media manager. This high-severity vulnerability (CVSS 8.3) requires user interaction but poses significant risk to e-commerce platforms using affected VirtueMart versions, potentially enabling remote code execution through malicious file uploads. The vulnerability is network-accessible, requires no special privileges, and impacts confidentiality, integrity, and availability of affected systems.
Technical Context
The vulnerability exists in VirtueMart's image upload processing mechanism, which fails to properly validate CSRF tokens during file upload operations in the media manager. VirtueMart is a Joomla-based e-commerce component (CPE: cpe:/a:virtuemart:virtuemart) that integrates deeply with Joomla's framework. The root cause falls under CWE-352 (Cross-Site Request Forgery), indicating insufficient or improperly implemented token validation. The CSRF protection bypass suggests either: (1) the token validation logic contains a logic flaw allowing token reuse or manipulation, (2) the upload handler lacks proper token checking entirely in certain code paths, or (3) the token is validated but can be predicted/extracted. This is particularly dangerous in e-commerce contexts where file uploads directly affect product catalogs and can potentially lead to code execution if uploaded files are processed server-side.
Affected Products
VirtueMart (product image upload functionality) - specific version ranges not provided in the description but likely affects recent versions. CPE specification: cpe:/a:virtuemart:virtuemart. Affected systems are primarily e-commerce installations using Joomla with VirtueMart component enabled. Secondary affected products include any Joomla installations (cpe:/a:joomla:joomla) running vulnerable VirtueMart versions, as VirtueMart is a component rather than standalone software. Systems running on Apache/Nginx with PHP backend are typical configurations. Vendor advisory links and specific patched versions should be obtained from: https://www.virtuemart.net/security-advisories or Joomla's official vulnerability database.
Remediation
Immediate actions: (1) Restrict access to VirtueMart media manager to trusted administrator roles only, limiting user interaction opportunity; (2) Implement Web Application Firewall (WAF) rules to detect and block CSRF patterns targeting upload endpoints; (3) Enforce SameSite cookie attributes (SameSite=Strict) on Joomla session cookies to prevent cross-site cookie transmission. Long-term: (1) Apply official VirtueMart security patch when released (check virtuemart.net/downloads and Joomla security announcements); (2) Implement additional CSRF token validation: regenerate tokens per request rather than per session, validate referrer headers, implement double-submit cookies with encryption; (3) Implement file upload validation: whitelist allowed MIME types, disable script execution in upload directories via .htaccess/nginx config; (4) Review and audit image processing pipelines to prevent post-upload exploitation. Monitor VirtueMart release notes and Joomla security tracker for patch availability.
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