CVE-2021-47923

CRITICAL 9.8

OpenCart 3.0.3.8 Session Fixation via OCSESSID Cookie

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-290
Vendor	opencart
Product	opencart
Published	May 10, 2026
Last Updated	May 11, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Opencart / opencart

3.0.3.8

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/50555 opencart.com: https://www.opencart.com/ vulncheck.com: https://www.vulncheck.com/advisories/opencart-session-fixation-via-ocsessid-cookie

Credits

Hubert Wojciechowski