Session Fixation Vulnerability in OpenCart by OpenCart
CVE-2021-47923

9.3CRITICAL

Key Information:

Vendor

Opencart

Status
Opencart
Vendor
CVE Published:
10 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47923?

OpenCart 3.0.3.8 is susceptible to a session fixation vulnerability, whereby attackers can manipulate the OCSESSID cookie to inject arbitrary values. By doing so, they can hijack user sessions, potentially granting unauthorized access to user accounts and confidential information. This flaw emphasizes the need for secure session management practices to prevent such exploitation.

Affected Version(s)

opencart 3.0.3.8

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47923 - Proof of Concept

References

https://www.exploit-db.com/exploits/50555
exploit
https://www.opencart.com/
product
https://www.vulncheck.com/advisories/opencart-session-fix...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Hubert Wojciechowski
.