CVE-2021-47923: Opencart

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

OpenCart 3.0.3.8 contains a session fixation vulnerability that allows attackers to hijack user sessions by injecting arbitrary values into the OCSESSID cookie. Attackers can set malicious OCSESSID cookie values that the server accepts and maintains, enabling session takeover and unauthorized access to user accounts.

Affected products

• Opencart Opencart: version 3.0.3.8 only

Published 2026-05-10. Last modified 2026-10-06.