EUVD-2026-69801
GHSA-9j6j-43p2-38v2
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessRegister low-privilege customer account
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DeliverySet `firstname` to XSS payload via account edit
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ExploitAdmin triggers autocomplete customer search
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ExecutionStored payload renders unsanitized in admin browser
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ImpactMalicious script executes in admin session context
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Attacker must possess or be able to create a low-privilege customer account on the target OpenCart store (PR:L). A victim - most likely an admin or staff member - must actively trigger the Autocomplete Workflow that renders customer |
| Impact | The CVSS 4.0 base score of 2.0 accurately reflects the constrained nature of this vulnerability: exploitation requires a valid customer account (PR:L), victim interaction (UI:P), and produces only low integrity impact with no confidentiality or availability consequences. No KEV listing exists and EPSS data is not provided, though a public POC raises the realistic exploitation probability modestly. Even a mid-sized operator should treat this as a low-urgency hardening item rather than an emergency - the attack surface is meaningful only in deployments where admins regularly use the autocomplete customer-lookup feature and where attackers can freely register customer accounts. The absence of a vendor response or patch is a risk-process concern more than an immediate threat amplifier given the limited impact scope. |
| Exploit ScenarioDerived | An attacker registers a customer account on an OpenCart 4.1.0.3/4.1.0.4 store and sets their |
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Alert meAnalysisAIv1 – Sep 02, 2026
Stored cross-site scripting in OpenCart 4.1.0.3 and 4.1.0.4 allows an authenticated customer to inject malicious script content via the firstname field in catalog/controller/account/edit.php, which executes in the browser of any user (likely an admin or staff member) who triggers the Autocomplete Workflow over customer data. A public proof-of-concept is available on GitHub. No vendor patch exists - the vendor did not respond to the coordinated disclosure.
RemediationAI
No vendor-released patch is available at the time of analysis - the vendor did not respond to disclosure. Operators on OpenCart 4.1.0.3 or 4.1.0.4 should apply output encoding to the firstname and related name fields wherever rendered in autocomplete suggestions (a theme-layer or controller-level fix). As a compensating control, deploying a WAF rule to block common XSS payloads (e.g., <script>, javascript:, event-handler attributes) in the firstname POST parameter reduces exposure with minimal operational impact. Disabling open customer registration while awaiting an upstream fix limits the attacker's ability to supply the malicious payload, at the cost of blocking legitimate sign-ups. The GitHub POC at https://github.com/Leousum/VulnPoC/blob/main/OpenCart_4.1.0.3/customer-name-stored-xss.md provides technical detail useful for reproducing and testing any manual fix.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
OpenCart is a PHP-based open-source e-commerce platform. The vulnerable component is the Autocomplete Workflow in catalog/controller/account/edit.php, where the firstname parameter is insufficiently sanitized before being rendered in browser output. CWE-79 (Improper Neutralization of Input During Web Page Generation) describes the root cause: user-supplied input is stored and later reflected into a dynamic HTML context without adequate output encoding. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:P) confirms the attack is network-initiated, requires a low-privilege account (a registered customer), and requires the victim to interact with the autocomplete feature. The POC repository (Leousum/VulnPoC) labels this specifically as 'customer-name-stored-xss', confirming the payload persists across sessions once set.
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Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
Requires authenticated customer account (PR:L) and admin interaction with autocomplete (UI:R); impact is integrity-only with no scope change.
Primary rating from Vendor (vuldb).
CVSS VectorVendor: vuldb
DescriptionCVE.org
A vulnerability was determined in OpenCart 4.1.0.3/4.1.0.4. This affects an unknown function of the file catalog/controller/account/edit.php of the component Autocomplete Workflow. This manipulation of the argument firstname causes cross site scripting. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
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