Vulnerability · Published May 10, 2026 · Assigned by VulnCheck
CVE-2021-47923OpenCart 3.0.3.8 Session Fixation via OCSESSID Cookie
Critical 9.8
In plain English
A critical-severity authentication bypass by spoofing in opencart from Opencart. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.4%top 63.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
Weakness: CWE-290 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- ExploitDB-50555 exploit
- Official Product Homepage product
- VulnCheck Advisory: OpenCart 3.0.3.8 Session Fixation via OCSESSID Cookie third-party-advisory