CVE-2026-3714Network attack vector

Authenticated code execution via incompletely filtered Twig overrides

Published Mar 8, 2026 · Updated Mar 8, 2026

Server-side template injection in OpenCart 4.0.2.3 allows remote authenticated users to execute code through the administrative Theme Editor. The Save function in admin/controller/design/template.php incompletely filters Twig special elements before storing an enabled override that the storefront later renders. Administrative Theme Editor access is required; successful payloads run in the server-side template context and can read or alter application data or interrupt the storefront.

CVSS severity5.1
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in OpenCart 4.0.2.3 allows remote authenticated users to execute code through the administrative Theme Editor. The Save function in admin/controller/design/template.php incompletely filters Twig special elements before storing an enabled override that the storefront later renders. Administrative Theme Editor access is required; successful payloads run in the server-side template context and can read or alter application data or interrupt the storefront.

The record

CVE
CVE-2026-3714
Published
Mar 8, 2026
Updated
Mar 8, 2026
Vendor
OpenCart
Product
OpenCart
Classifications
CWE-1336, CWE-791, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

OpenCart · OpenCartversion=4.0.2.3

Published CVSS scores

5.8VulDBAV:N/AC:L/Au:M/C:P/I:P/A:P
5.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
4.7VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CWE-791Incomplete Filtering of Special Elements
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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