CVE-2021-47923 OpenCart 3.0.3.8 Session Fixation via OCSESSID Cookie
Attackers can hijack user sessions by injecting arbitrary values into the OCSESSID cookie, leading to unauthorized account access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47923?
CVE-2021-47923 is a critical authentication bypass vulnerability in opencart, published on 10 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-290
Which versions are affected by CVE-2021-47923?
How do I fix CVE-2021-47923?
No fix has been published for CVE-2021-47923 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-47923 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47923 exists.
Sources
Also known as GHSA-5hhh-fq62-xfww.