CVE-2021-47923
📛 CVE Title
(no title)
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.
Overview
- State
- —
- Assigner (CNA)
- —
- CVSS severity
- critical
- CVSS score
- 9.8 / 10
- CVSS vector
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Effective score
- 9.8 / 10 CRITICAL source: CNA overview
- CWE(s)
- —
- Reserved
- —
- Published
- —
- Last updated
- —
- Source
- https://www.tenable.com/cve/CVE-2021-47923
- Linked Threat
- CVE-2021-47923 — CVE-2021-47923
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-10 13:16:28 UTC
- NVD last modified
- 2026-05-12 14:24:15 UTC
- NVD CVSS v3.1
- 9.8 / 10 CRITICAL source: disclosure@vulncheck.com
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 5.9 / 10
- EPSS score
- 0.0007 (probability of exploitation in next 30 days)
- EPSS percentile
- 20.95% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD-assigned CWE(s):
CWE-290
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-05-24 23:58 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2021-34785 - Assigner
- VulnCheck
- Published
- May 10, 2026, 12:43:45 PM
- Updated
- May 11, 2026, 3:14:34 PM
- EUVD base score (CVSS 4.0)
-
9.3 / 10
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 - EUVD-reported EPSS
- 0.0700
- Vendors
- Opencart
- Products
-
Opencart (3.0.3.8)Opencart (3.0.3.8)
ENISA 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.
Vendor references (0)
References embedded in the original CVE record by the assigning CNA.
None in the CVE record.
Web references (6)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://nvd.nist.gov/vuln/detail/CVE-2021-47923 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2021-47923 tenable:www.cve.org
- https://www.exploit-db.com/exploits/50555 tenable:www.exploit-db.com
- https://www.first.org/epss/ tenable:www.first.org
- https://www.opencart.com/ tenable:www.opencart.com
- https://www.vulncheck.com/advisories/opencart-session-fixation-via-ocsessid-cookie tenable:www.vulncheck.com
NVD-tagged references (3)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://www.exploit-db.com/exploits/50555 disclosure@vulncheck.com
- https://www.opencart.com/ disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/opencart-session-fixation-via-ocsessid-cookie disclosure@vulncheck.com
Remediations (10)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:arstechnica.com
Google publishes exploit code threatening millions of Chromium users Google publishes exploit code before patch , reported 42 months earlier, is fixed.
2026-05-26 02:51 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-05-26 02:51 UTC -
web:nvd.nist.gov
The NVD is the U.S. government repository of standards based vulnerability management data represented using the Security Content Automation Protocol (SCAP). This data enables automation of vulnerability management, security measurement, and compliance. The NVD includes databases of security checklist references, security-related software flaws, product names, and impact metrics. For ...
2026-05-26 02:51 UTC -
web:securityboulevard.com
Cybersecurity vulnerabilities pose significant risks to organizations in today's digital landscape. Left unaddressed, these vulnerabilities can lead to data breaches, financial losses, and reputational damage. Organizations must decide how to tackle vulnerabilities—through remediation , mitigation , or a combination of both. But which strategy is more effective? This blog explores the ...
2026-05-26 02:51 UTC -
web:www.bugcrowd.com
Vulnerability mitigation is typically considered a temporary or interim solution. While mitigation measures can reduce the immediate risk associated with vulnerabilities, they may not provide a permanent fix . Organizations should aim to prioritize and plan for complete vulnerability remediation whenever feasible and allocate resources accordingly.
2026-05-26 02:51 UTC -
web:www.cve.org
At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures
2026-05-26 02:51 UTC -
web:www.forbes.com
Mitigation Measures To Take If Patching Isn't Possible Assuming a patch can't be promptly applied, what can be done to mitigate risk? There are several important measures to keep in mind:
2026-05-26 02:51 UTC -
web:www.oracle.com
Critical Security Patch Updates Critical Security Patch Updates provide security patches for supported Oracle on-premises products. A Critical Security Patch Update provides targeted, high-priority security fixes in a smaller, more focused format, making them easier to apply with minimal disruption.
2026-05-26 02:51 UTC -
web:www.secure.com
Learn the difference between vulnerability remediation and mitigation , and how a risk-based strategy can strengthen your security posture.
2026-05-26 02:51 UTC -
web:www.virustotal.com
VirusTotal is a platform for scanning files and URLs for viruses, malware, and other threats using multiple antivirus engines.
2026-05-26 02:51 UTC
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