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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.

PUBLISHED Reserved 2026-02-01 | Published 2026-05-10 | Updated 2026-05-10 | Assigner VulnCheck




CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

Authentication Bypass by Spoofing

Product status

3.0.3.8
affected

Credits

Hubert Wojciechowski finder

References

www.exploit-db.com/exploits/50555 (ExploitDB-50555) exploit

www.opencart.com/ (Official Product Homepage) product

www.vulncheck.com/...rt-session-fixation-via-ocsessid-cookie (VulnCheck Advisory: OpenCart 3.0.3.8 Session Fixation via OCSESSID Cookie) third-party-advisory

cve.org (CVE-2021-47923)

nvd.nist.gov (CVE-2021-47923)

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