X-Cart V5 is vulnerable to XSS via the CategoryFilter2 parameter.

X-Cart 5.2.23, 5.3.1.9, 5.3.2.13, and 5.3.3 is vulnerable to Remote Code Execution. This vulnerability exists because the application fails to check remote file extensions before saving locally. This vulnerability can be exploited by anyone with Vendor access or higher. One attack methodology is to upload an image file in the Attachments section of a product catalog, upload a .php file with an "Add File Via URL" action, and change the image's Description URL to reference the .php URL in the attachments/ directory.

Cross-site scripting (XSS) vulnerability in X-Cart 4.5.0 and earlier allows remote attackers to inject arbitrary web script or HTML via unspecified vectors to install/.

Cross-site scripting (XSS) vulnerability in admin.php in X-Cart 5.1.6 through 5.1.10 allows remote attackers to inject arbitrary web script or HTML via the substring parameter.

X-Cart before 5.1.11 allows remote authenticated users to read or delete address data of arbitrary accounts via a modified (1) update or (2) remove request.

Multiple cross-site scripting (XSS) vulnerabilities in cart.php in X-Cart 5.1.8 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) product_id or (2) category_id parameter.

Cross-site scripting (XSS) vulnerability in products_map.php in X-Cart Gold 4.5 allows remote attackers to inject arbitrary web script or HTML via the symb parameter.

Multiple PHP remote file inclusion vulnerabilities in X-Cart allow remote attackers to execute arbitrary PHP code via a URL in the xcart_dir parameter to (1) config.php, (2) prepare.php, (3) smarty.php, (4) customer/product.php, (5) provider/auth.php, and (6) admin/auth.php.

Dynamic variable evaluation vulnerability in cmpi.php in Qualiteam X-Cart 4.1.3 and earlier allows remote attackers to overwrite arbitrary program variables and execute arbitrary PHP code, as demonstrated by PHP remote file inclusion via the xcart_dir parameter.

SQL injection vulnerability in search.php in X-Cart Gold and Pro 4.0.18, and X-Cart 4.1.0 beta 1, allows remote attackers to execute arbitrary SQL commands via the "Search for pattern" field, when the settings specify only "Search in Detailed description" and "Search also in ISBN." NOTE: the vendor disputed this issue in a comment on the original researcher's blog, saying "the bug does not impose any security threat and remote attackers can't add, modify, or delete information in the back-end database by sending specially-crafted SQL statements to the search.php script using various search parameters." As of 20060605, the original blog entry is unavailable, although ISS also reports the same dispute. CVE has not been able to investigate this issue further, although the researcher sometimes makes inaccurate claims