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Vulnerability record · CVE-2021-47923 · published 10 May 2026

CVE-2021-47923: Authentication bypass by spoofing vulnerability

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.

9.3 CVSS 4.0 Critical EPSS 0.42% · top 65.9% CWE-290 · Authentication bypass by spoofing Deferred
9.3CVSS 4.0 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
25 Jul 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-47923), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.