CVE-2021-47923

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 v4.0

9.3 CRITICALCVSS: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:X/V:X/RE:X/U:X

CVSS v3.1

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

EPSS

0.42% chance of exploitation in the next 30 days, 35th percentile

Published

2026-05-10

Updated

2026-05-11

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/50555

References

• CVE Record
• NVD entry

Related

• CVE-2021-47922
• CVE-2021-47924
• CVE-2021-47921
• CVE-2021-47925
• CVE-2021-47920
• CVE-2021-47926