The Zen Cart official forum released an important security patch for all Zen Cart users. The necessary steps to fix the issue are published on the forum and concerns only version 1.5.4 of Zen Cart. Note that this service is performed automatically for all our subscription clients.
We always recommend keeping your system up to date with the latest versions and security patches. By updating you can take advantage of important security fixes, bug fixes and new features and protect your site from malware and remote attackers.